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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Procedures for interfacing to Open Firmware.
4 *
5 * Paul Mackerras August 1996.
6 * Copyright (C) 1996-2005 Paul Mackerras.
7 *
8 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
9 * {engebret|bergner}@us.ibm.com
10 */
11
12#undef DEBUG_PROM
13
14/* we cannot use FORTIFY as it brings in new symbols */
15#define __NO_FORTIFY
16
17#include <linux/stdarg.h>
18#include <linux/kernel.h>
19#include <linux/string.h>
20#include <linux/init.h>
21#include <linux/threads.h>
22#include <linux/spinlock.h>
23#include <linux/types.h>
24#include <linux/pci.h>
25#include <linux/proc_fs.h>
26#include <linux/delay.h>
27#include <linux/initrd.h>
28#include <linux/bitops.h>
29#include <linux/pgtable.h>
30#include <linux/printk.h>
31#include <linux/of.h>
32#include <linux/of_fdt.h>
33#include <asm/prom.h>
34#include <asm/rtas.h>
35#include <asm/page.h>
36#include <asm/processor.h>
37#include <asm/interrupt.h>
38#include <asm/irq.h>
39#include <asm/io.h>
40#include <asm/smp.h>
41#include <asm/mmu.h>
42#include <asm/iommu.h>
43#include <asm/btext.h>
44#include <asm/sections.h>
45#include <asm/setup.h>
46#include <asm/asm-prototypes.h>
47#include <asm/ultravisor-api.h>
48
49#include <linux/linux_logo.h>
50
51/* All of prom_init bss lives here */
52#define __prombss __section(".bss.prominit")
53
54/*
55 * Eventually bump that one up
56 */
57#define DEVTREE_CHUNK_SIZE 0x100000
58
59/*
60 * This is the size of the local memory reserve map that gets copied
61 * into the boot params passed to the kernel. That size is totally
62 * flexible as the kernel just reads the list until it encounters an
63 * entry with size 0, so it can be changed without breaking binary
64 * compatibility
65 */
66#define MEM_RESERVE_MAP_SIZE 8
67
68/*
69 * prom_init() is called very early on, before the kernel text
70 * and data have been mapped to KERNELBASE. At this point the code
71 * is running at whatever address it has been loaded at.
72 * On ppc32 we compile with -mrelocatable, which means that references
73 * to extern and static variables get relocated automatically.
74 * ppc64 objects are always relocatable, we just need to relocate the
75 * TOC.
76 *
77 * Because OF may have mapped I/O devices into the area starting at
78 * KERNELBASE, particularly on CHRP machines, we can't safely call
79 * OF once the kernel has been mapped to KERNELBASE. Therefore all
80 * OF calls must be done within prom_init().
81 *
82 * ADDR is used in calls to call_prom. The 4th and following
83 * arguments to call_prom should be 32-bit values.
84 * On ppc64, 64 bit values are truncated to 32 bits (and
85 * fortunately don't get interpreted as two arguments).
86 */
87#define ADDR(x) (u32)(unsigned long)(x)
88
89#ifdef CONFIG_PPC64
90#define OF_WORKAROUNDS 0
91#else
92#define OF_WORKAROUNDS of_workarounds
93static int of_workarounds __prombss;
94#endif
95
96#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
97#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
98
99#ifdef DEBUG_PROM
100#define prom_debug(x...) prom_printf(x)
101#else
102#define prom_debug(x...) do { } while (0)
103#endif
104
105
106typedef u32 prom_arg_t;
107
108struct prom_args {
109 __be32 service;
110 __be32 nargs;
111 __be32 nret;
112 __be32 args[10];
113};
114
115struct prom_t {
116 ihandle root;
117 phandle chosen;
118 int cpu;
119 ihandle stdout;
120 ihandle mmumap;
121 ihandle memory;
122};
123
124struct mem_map_entry {
125 __be64 base;
126 __be64 size;
127};
128
129typedef __be32 cell_t;
130
131extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
132 unsigned long r6, unsigned long r7, unsigned long r8,
133 unsigned long r9);
134
135#ifdef CONFIG_PPC64
136extern int enter_prom(struct prom_args *args, unsigned long entry);
137#else
138static inline int enter_prom(struct prom_args *args, unsigned long entry)
139{
140 return ((int (*)(struct prom_args *))entry)(args);
141}
142#endif
143
144extern void copy_and_flush(unsigned long dest, unsigned long src,
145 unsigned long size, unsigned long offset);
146
147/* prom structure */
148static struct prom_t __prombss prom;
149
150static unsigned long __prombss prom_entry;
151
152static char __prombss of_stdout_device[256];
153static char __prombss prom_scratch[256];
154
155static unsigned long __prombss dt_header_start;
156static unsigned long __prombss dt_struct_start, dt_struct_end;
157static unsigned long __prombss dt_string_start, dt_string_end;
158
159static unsigned long __prombss prom_initrd_start, prom_initrd_end;
160
161#ifdef CONFIG_PPC64
162static int __prombss prom_iommu_force_on;
163static int __prombss prom_iommu_off;
164static unsigned long __prombss prom_tce_alloc_start;
165static unsigned long __prombss prom_tce_alloc_end;
166#endif
167
168#ifdef CONFIG_PPC_PSERIES
169static bool __prombss prom_radix_disable;
170static bool __prombss prom_radix_gtse_disable;
171static bool __prombss prom_xive_disable;
172#endif
173
174#ifdef CONFIG_PPC_SVM
175static bool __prombss prom_svm_enable;
176#endif
177
178struct platform_support {
179 bool hash_mmu;
180 bool radix_mmu;
181 bool radix_gtse;
182 bool xive;
183};
184
185/* Platforms codes are now obsolete in the kernel. Now only used within this
186 * file and ultimately gone too. Feel free to change them if you need, they
187 * are not shared with anything outside of this file anymore
188 */
189#define PLATFORM_PSERIES 0x0100
190#define PLATFORM_PSERIES_LPAR 0x0101
191#define PLATFORM_LPAR 0x0001
192#define PLATFORM_POWERMAC 0x0400
193#define PLATFORM_GENERIC 0x0500
194
195static int __prombss of_platform;
196
197static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
198
199static unsigned long __prombss prom_memory_limit;
200
201static unsigned long __prombss alloc_top;
202static unsigned long __prombss alloc_top_high;
203static unsigned long __prombss alloc_bottom;
204static unsigned long __prombss rmo_top;
205static unsigned long __prombss ram_top;
206
207static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
208static int __prombss mem_reserve_cnt;
209
210static cell_t __prombss regbuf[1024];
211
212static bool __prombss rtas_has_query_cpu_stopped;
213
214
215/*
216 * Error results ... some OF calls will return "-1" on error, some
217 * will return 0, some will return either. To simplify, here are
218 * macros to use with any ihandle or phandle return value to check if
219 * it is valid
220 */
221
222#define PROM_ERROR (-1u)
223#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
224#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
225
226/* Copied from lib/string.c and lib/kstrtox.c */
227
228static int __init prom_strcmp(const char *cs, const char *ct)
229{
230 unsigned char c1, c2;
231
232 while (1) {
233 c1 = *cs++;
234 c2 = *ct++;
235 if (c1 != c2)
236 return c1 < c2 ? -1 : 1;
237 if (!c1)
238 break;
239 }
240 return 0;
241}
242
243static ssize_t __init prom_strscpy_pad(char *dest, const char *src, size_t n)
244{
245 ssize_t rc;
246 size_t i;
247
248 if (n == 0 || n > INT_MAX)
249 return -E2BIG;
250
251 // Copy up to n bytes
252 for (i = 0; i < n && src[i] != '\0'; i++)
253 dest[i] = src[i];
254
255 rc = i;
256
257 // If we copied all n then we have run out of space for the nul
258 if (rc == n) {
259 // Rewind by one character to ensure nul termination
260 i--;
261 rc = -E2BIG;
262 }
263
264 for (; i < n; i++)
265 dest[i] = '\0';
266
267 return rc;
268}
269
270static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
271{
272 unsigned char c1, c2;
273
274 while (count) {
275 c1 = *cs++;
276 c2 = *ct++;
277 if (c1 != c2)
278 return c1 < c2 ? -1 : 1;
279 if (!c1)
280 break;
281 count--;
282 }
283 return 0;
284}
285
286static size_t __init prom_strlen(const char *s)
287{
288 const char *sc;
289
290 for (sc = s; *sc != '\0'; ++sc)
291 /* nothing */;
292 return sc - s;
293}
294
295static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
296{
297 const unsigned char *su1, *su2;
298 int res = 0;
299
300 for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
301 if ((res = *su1 - *su2) != 0)
302 break;
303 return res;
304}
305
306static char __init *prom_strstr(const char *s1, const char *s2)
307{
308 size_t l1, l2;
309
310 l2 = prom_strlen(s2);
311 if (!l2)
312 return (char *)s1;
313 l1 = prom_strlen(s1);
314 while (l1 >= l2) {
315 l1--;
316 if (!prom_memcmp(s1, s2, l2))
317 return (char *)s1;
318 s1++;
319 }
320 return NULL;
321}
322
323static size_t __init prom_strlcat(char *dest, const char *src, size_t count)
324{
325 size_t dsize = prom_strlen(dest);
326 size_t len = prom_strlen(src);
327 size_t res = dsize + len;
328
329 /* This would be a bug */
330 if (dsize >= count)
331 return count;
332
333 dest += dsize;
334 count -= dsize;
335 if (len >= count)
336 len = count-1;
337 memcpy(dest, src, len);
338 dest[len] = 0;
339 return res;
340
341}
342
343#ifdef CONFIG_PPC_PSERIES
344static int __init prom_strtobool(const char *s, bool *res)
345{
346 if (!s)
347 return -EINVAL;
348
349 switch (s[0]) {
350 case 'y':
351 case 'Y':
352 case '1':
353 *res = true;
354 return 0;
355 case 'n':
356 case 'N':
357 case '0':
358 *res = false;
359 return 0;
360 case 'o':
361 case 'O':
362 switch (s[1]) {
363 case 'n':
364 case 'N':
365 *res = true;
366 return 0;
367 case 'f':
368 case 'F':
369 *res = false;
370 return 0;
371 default:
372 break;
373 }
374 break;
375 default:
376 break;
377 }
378
379 return -EINVAL;
380}
381#endif
382
383/* This is the one and *ONLY* place where we actually call open
384 * firmware.
385 */
386
387static int __init call_prom(const char *service, int nargs, int nret, ...)
388{
389 int i;
390 struct prom_args args;
391 va_list list;
392
393 args.service = cpu_to_be32(ADDR(service));
394 args.nargs = cpu_to_be32(nargs);
395 args.nret = cpu_to_be32(nret);
396
397 va_start(list, nret);
398 for (i = 0; i < nargs; i++)
399 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
400 va_end(list);
401
402 for (i = 0; i < nret; i++)
403 args.args[nargs+i] = 0;
404
405 if (enter_prom(&args, prom_entry) < 0)
406 return PROM_ERROR;
407
408 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
409}
410
411static int __init call_prom_ret(const char *service, int nargs, int nret,
412 prom_arg_t *rets, ...)
413{
414 int i;
415 struct prom_args args;
416 va_list list;
417
418 args.service = cpu_to_be32(ADDR(service));
419 args.nargs = cpu_to_be32(nargs);
420 args.nret = cpu_to_be32(nret);
421
422 va_start(list, rets);
423 for (i = 0; i < nargs; i++)
424 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
425 va_end(list);
426
427 for (i = 0; i < nret; i++)
428 args.args[nargs+i] = 0;
429
430 if (enter_prom(&args, prom_entry) < 0)
431 return PROM_ERROR;
432
433 if (rets != NULL)
434 for (i = 1; i < nret; ++i)
435 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
436
437 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
438}
439
440
441static void __init prom_print(const char *msg)
442{
443 const char *p, *q;
444
445 if (prom.stdout == 0)
446 return;
447
448 for (p = msg; *p != 0; p = q) {
449 for (q = p; *q != 0 && *q != '\n'; ++q)
450 ;
451 if (q > p)
452 call_prom("write", 3, 1, prom.stdout, p, q - p);
453 if (*q == 0)
454 break;
455 ++q;
456 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
457 }
458}
459
460
461/*
462 * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
463 * we do not need __udivdi3 or __umoddi3 on 32bits.
464 */
465static void __init prom_print_hex(unsigned long val)
466{
467 int i, nibbles = sizeof(val)*2;
468 char buf[sizeof(val)*2+1];
469
470 for (i = nibbles-1; i >= 0; i--) {
471 buf[i] = (val & 0xf) + '0';
472 if (buf[i] > '9')
473 buf[i] += ('a'-'0'-10);
474 val >>= 4;
475 }
476 buf[nibbles] = '\0';
477 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
478}
479
480/* max number of decimal digits in an unsigned long */
481#define UL_DIGITS 21
482static void __init prom_print_dec(unsigned long val)
483{
484 int i, size;
485 char buf[UL_DIGITS+1];
486
487 for (i = UL_DIGITS-1; i >= 0; i--) {
488 buf[i] = (val % 10) + '0';
489 val = val/10;
490 if (val == 0)
491 break;
492 }
493 /* shift stuff down */
494 size = UL_DIGITS - i;
495 call_prom("write", 3, 1, prom.stdout, buf+i, size);
496}
497
498__printf(1, 2)
499static void __init prom_printf(const char *format, ...)
500{
501 const char *p, *q, *s;
502 va_list args;
503 unsigned long v;
504 long vs;
505 int n = 0;
506
507 va_start(args, format);
508 for (p = format; *p != 0; p = q) {
509 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
510 ;
511 if (q > p)
512 call_prom("write", 3, 1, prom.stdout, p, q - p);
513 if (*q == 0)
514 break;
515 if (*q == '\n') {
516 ++q;
517 call_prom("write", 3, 1, prom.stdout,
518 ADDR("\r\n"), 2);
519 continue;
520 }
521 ++q;
522 if (*q == 0)
523 break;
524 while (*q == 'l') {
525 ++q;
526 ++n;
527 }
528 switch (*q) {
529 case 's':
530 ++q;
531 s = va_arg(args, const char *);
532 prom_print(s);
533 break;
534 case 'x':
535 ++q;
536 switch (n) {
537 case 0:
538 v = va_arg(args, unsigned int);
539 break;
540 case 1:
541 v = va_arg(args, unsigned long);
542 break;
543 case 2:
544 default:
545 v = va_arg(args, unsigned long long);
546 break;
547 }
548 prom_print_hex(v);
549 break;
550 case 'u':
551 ++q;
552 switch (n) {
553 case 0:
554 v = va_arg(args, unsigned int);
555 break;
556 case 1:
557 v = va_arg(args, unsigned long);
558 break;
559 case 2:
560 default:
561 v = va_arg(args, unsigned long long);
562 break;
563 }
564 prom_print_dec(v);
565 break;
566 case 'd':
567 ++q;
568 switch (n) {
569 case 0:
570 vs = va_arg(args, int);
571 break;
572 case 1:
573 vs = va_arg(args, long);
574 break;
575 case 2:
576 default:
577 vs = va_arg(args, long long);
578 break;
579 }
580 if (vs < 0) {
581 prom_print("-");
582 vs = -vs;
583 }
584 prom_print_dec(vs);
585 break;
586 }
587 }
588 va_end(args);
589}
590
591
592static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
593 unsigned long align)
594{
595
596 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
597 /*
598 * Old OF requires we claim physical and virtual separately
599 * and then map explicitly (assuming virtual mode)
600 */
601 int ret;
602 prom_arg_t result;
603
604 ret = call_prom_ret("call-method", 5, 2, &result,
605 ADDR("claim"), prom.memory,
606 align, size, virt);
607 if (ret != 0 || result == -1)
608 return -1;
609 ret = call_prom_ret("call-method", 5, 2, &result,
610 ADDR("claim"), prom.mmumap,
611 align, size, virt);
612 if (ret != 0) {
613 call_prom("call-method", 4, 1, ADDR("release"),
614 prom.memory, size, virt);
615 return -1;
616 }
617 /* the 0x12 is M (coherence) + PP == read/write */
618 call_prom("call-method", 6, 1,
619 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
620 return virt;
621 }
622 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
623 (prom_arg_t)align);
624}
625
626static void __init __attribute__((noreturn)) prom_panic(const char *reason)
627{
628 prom_print(reason);
629 /* Do not call exit because it clears the screen on pmac
630 * it also causes some sort of double-fault on early pmacs */
631 if (of_platform == PLATFORM_POWERMAC)
632 asm("trap\n");
633
634 /* ToDo: should put up an SRC here on pSeries */
635 call_prom("exit", 0, 0);
636
637 for (;;) /* should never get here */
638 ;
639}
640
641
642static int __init prom_next_node(phandle *nodep)
643{
644 phandle node;
645
646 if ((node = *nodep) != 0
647 && (*nodep = call_prom("child", 1, 1, node)) != 0)
648 return 1;
649 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
650 return 1;
651 for (;;) {
652 if ((node = call_prom("parent", 1, 1, node)) == 0)
653 return 0;
654 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
655 return 1;
656 }
657}
658
659static inline int __init prom_getprop(phandle node, const char *pname,
660 void *value, size_t valuelen)
661{
662 return call_prom("getprop", 4, 1, node, ADDR(pname),
663 (u32)(unsigned long) value, (u32) valuelen);
664}
665
666static inline int __init prom_getproplen(phandle node, const char *pname)
667{
668 return call_prom("getproplen", 2, 1, node, ADDR(pname));
669}
670
671static void __init add_string(char **str, const char *q)
672{
673 char *p = *str;
674
675 while (*q)
676 *p++ = *q++;
677 *p++ = ' ';
678 *str = p;
679}
680
681static char *__init tohex(unsigned int x)
682{
683 static const char digits[] __initconst = "0123456789abcdef";
684 static char result[9] __prombss;
685 int i;
686
687 result[8] = 0;
688 i = 8;
689 do {
690 --i;
691 result[i] = digits[x & 0xf];
692 x >>= 4;
693 } while (x != 0 && i > 0);
694 return &result[i];
695}
696
697static int __init prom_setprop(phandle node, const char *nodename,
698 const char *pname, void *value, size_t valuelen)
699{
700 char cmd[256], *p;
701
702 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
703 return call_prom("setprop", 4, 1, node, ADDR(pname),
704 (u32)(unsigned long) value, (u32) valuelen);
705
706 /* gah... setprop doesn't work on longtrail, have to use interpret */
707 p = cmd;
708 add_string(&p, "dev");
709 add_string(&p, nodename);
710 add_string(&p, tohex((u32)(unsigned long) value));
711 add_string(&p, tohex(valuelen));
712 add_string(&p, tohex(ADDR(pname)));
713 add_string(&p, tohex(prom_strlen(pname)));
714 add_string(&p, "property");
715 *p = 0;
716 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
717}
718
719/* We can't use the standard versions because of relocation headaches. */
720#define prom_isxdigit(c) \
721 (('0' <= (c) && (c) <= '9') || ('a' <= (c) && (c) <= 'f') || ('A' <= (c) && (c) <= 'F'))
722
723#define prom_isdigit(c) ('0' <= (c) && (c) <= '9')
724#define prom_islower(c) ('a' <= (c) && (c) <= 'z')
725#define prom_toupper(c) (prom_islower(c) ? ((c) - 'a' + 'A') : (c))
726
727static unsigned long __init prom_strtoul(const char *cp, const char **endp)
728{
729 unsigned long result = 0, base = 10, value;
730
731 if (*cp == '0') {
732 base = 8;
733 cp++;
734 if (prom_toupper(*cp) == 'X') {
735 cp++;
736 base = 16;
737 }
738 }
739
740 while (prom_isxdigit(*cp) &&
741 (value = prom_isdigit(*cp) ? *cp - '0' : prom_toupper(*cp) - 'A' + 10) < base) {
742 result = result * base + value;
743 cp++;
744 }
745
746 if (endp)
747 *endp = cp;
748
749 return result;
750}
751
752static unsigned long __init prom_memparse(const char *ptr, const char **retptr)
753{
754 unsigned long ret = prom_strtoul(ptr, retptr);
755 int shift = 0;
756
757 /*
758 * We can't use a switch here because GCC *may* generate a
759 * jump table which won't work, because we're not running at
760 * the address we're linked at.
761 */
762 if ('G' == **retptr || 'g' == **retptr)
763 shift = 30;
764
765 if ('M' == **retptr || 'm' == **retptr)
766 shift = 20;
767
768 if ('K' == **retptr || 'k' == **retptr)
769 shift = 10;
770
771 if (shift) {
772 ret <<= shift;
773 (*retptr)++;
774 }
775
776 return ret;
777}
778
779/*
780 * Early parsing of the command line passed to the kernel, used for
781 * "mem=x" and the options that affect the iommu
782 */
783static void __init early_cmdline_parse(void)
784{
785 const char *opt;
786
787 char *p;
788 int l = 0;
789
790 prom_cmd_line[0] = 0;
791 p = prom_cmd_line;
792
793 if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && (long)prom.chosen > 0)
794 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
795
796 if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) || l <= 0 || p[0] == '\0')
797 prom_strlcat(prom_cmd_line, " " CONFIG_CMDLINE,
798 sizeof(prom_cmd_line));
799
800 prom_printf("command line: %s\n", prom_cmd_line);
801
802#ifdef CONFIG_PPC64
803 opt = prom_strstr(prom_cmd_line, "iommu=");
804 if (opt) {
805 prom_printf("iommu opt is: %s\n", opt);
806 opt += 6;
807 while (*opt && *opt == ' ')
808 opt++;
809 if (!prom_strncmp(opt, "off", 3))
810 prom_iommu_off = 1;
811 else if (!prom_strncmp(opt, "force", 5))
812 prom_iommu_force_on = 1;
813 }
814#endif
815 opt = prom_strstr(prom_cmd_line, "mem=");
816 if (opt) {
817 opt += 4;
818 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
819#ifdef CONFIG_PPC64
820 /* Align to 16 MB == size of ppc64 large page */
821 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
822#endif
823 }
824
825#ifdef CONFIG_PPC_PSERIES
826 prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
827 opt = prom_strstr(prom_cmd_line, "disable_radix");
828 if (opt) {
829 opt += 13;
830 if (*opt && *opt == '=') {
831 bool val;
832
833 if (prom_strtobool(++opt, &val))
834 prom_radix_disable = false;
835 else
836 prom_radix_disable = val;
837 } else
838 prom_radix_disable = true;
839 }
840 if (prom_radix_disable)
841 prom_debug("Radix disabled from cmdline\n");
842
843 opt = prom_strstr(prom_cmd_line, "radix_hcall_invalidate=on");
844 if (opt) {
845 prom_radix_gtse_disable = true;
846 prom_debug("Radix GTSE disabled from cmdline\n");
847 }
848
849 opt = prom_strstr(prom_cmd_line, "xive=off");
850 if (opt) {
851 prom_xive_disable = true;
852 prom_debug("XIVE disabled from cmdline\n");
853 }
854#endif /* CONFIG_PPC_PSERIES */
855
856#ifdef CONFIG_PPC_SVM
857 opt = prom_strstr(prom_cmd_line, "svm=");
858 if (opt) {
859 bool val;
860
861 opt += sizeof("svm=") - 1;
862 if (!prom_strtobool(opt, &val))
863 prom_svm_enable = val;
864 }
865#endif /* CONFIG_PPC_SVM */
866}
867
868#ifdef CONFIG_PPC_PSERIES
869/*
870 * The architecture vector has an array of PVR mask/value pairs,
871 * followed by # option vectors - 1, followed by the option vectors.
872 *
873 * See prom.h for the definition of the bits specified in the
874 * architecture vector.
875 */
876
877/* Firmware expects the value to be n - 1, where n is the # of vectors */
878#define NUM_VECTORS(n) ((n) - 1)
879
880/*
881 * Firmware expects 1 + n - 2, where n is the length of the option vector in
882 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
883 */
884#define VECTOR_LENGTH(n) (1 + (n) - 2)
885
886struct option_vector1 {
887 u8 byte1;
888 u8 arch_versions;
889 u8 arch_versions3;
890} __packed;
891
892struct option_vector2 {
893 u8 byte1;
894 __be16 reserved;
895 __be32 real_base;
896 __be32 real_size;
897 __be32 virt_base;
898 __be32 virt_size;
899 __be32 load_base;
900 __be32 min_rma;
901 __be32 min_load;
902 u8 min_rma_percent;
903 u8 max_pft_size;
904} __packed;
905
906struct option_vector3 {
907 u8 byte1;
908 u8 byte2;
909} __packed;
910
911struct option_vector4 {
912 u8 byte1;
913 u8 min_vp_cap;
914} __packed;
915
916struct option_vector5 {
917 u8 byte1;
918 u8 byte2;
919 u8 byte3;
920 u8 cmo;
921 u8 associativity;
922 u8 bin_opts;
923 u8 micro_checkpoint;
924 u8 reserved0;
925 __be32 max_cpus;
926 __be16 papr_level;
927 __be16 reserved1;
928 u8 platform_facilities;
929 u8 reserved2;
930 __be16 reserved3;
931 u8 subprocessors;
932 u8 byte22;
933 u8 intarch;
934 u8 mmu;
935 u8 hash_ext;
936 u8 radix_ext;
937} __packed;
938
939struct option_vector6 {
940 u8 reserved;
941 u8 secondary_pteg;
942 u8 os_name;
943} __packed;
944
945struct option_vector7 {
946 u8 os_id[256];
947} __packed;
948
949struct ibm_arch_vec {
950 struct { __be32 mask, val; } pvrs[14];
951
952 u8 num_vectors;
953
954 u8 vec1_len;
955 struct option_vector1 vec1;
956
957 u8 vec2_len;
958 struct option_vector2 vec2;
959
960 u8 vec3_len;
961 struct option_vector3 vec3;
962
963 u8 vec4_len;
964 struct option_vector4 vec4;
965
966 u8 vec5_len;
967 struct option_vector5 vec5;
968
969 u8 vec6_len;
970 struct option_vector6 vec6;
971
972 u8 vec7_len;
973 struct option_vector7 vec7;
974} __packed;
975
976static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
977 .pvrs = {
978 {
979 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
980 .val = cpu_to_be32(0x003a0000),
981 },
982 {
983 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
984 .val = cpu_to_be32(0x003e0000),
985 },
986 {
987 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
988 .val = cpu_to_be32(0x003f0000),
989 },
990 {
991 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
992 .val = cpu_to_be32(0x004b0000),
993 },
994 {
995 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
996 .val = cpu_to_be32(0x004c0000),
997 },
998 {
999 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
1000 .val = cpu_to_be32(0x004d0000),
1001 },
1002 {
1003 .mask = cpu_to_be32(0xffff0000), /* POWER9 */
1004 .val = cpu_to_be32(0x004e0000),
1005 },
1006 {
1007 .mask = cpu_to_be32(0xffff0000), /* POWER10 */
1008 .val = cpu_to_be32(0x00800000),
1009 },
1010 {
1011 .mask = cpu_to_be32(0xffffffff), /* all 3.1-compliant */
1012 .val = cpu_to_be32(0x0f000006),
1013 },
1014 {
1015 .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
1016 .val = cpu_to_be32(0x0f000005),
1017 },
1018 {
1019 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
1020 .val = cpu_to_be32(0x0f000004),
1021 },
1022 {
1023 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
1024 .val = cpu_to_be32(0x0f000003),
1025 },
1026 {
1027 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
1028 .val = cpu_to_be32(0x0f000002),
1029 },
1030 {
1031 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
1032 .val = cpu_to_be32(0x0f000001),
1033 },
1034 },
1035
1036 .num_vectors = NUM_VECTORS(6),
1037
1038 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
1039 .vec1 = {
1040 .byte1 = 0,
1041 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
1042 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
1043 .arch_versions3 = OV1_PPC_3_00 | OV1_PPC_3_1,
1044 },
1045
1046 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
1047 /* option vector 2: Open Firmware options supported */
1048 .vec2 = {
1049 .byte1 = OV2_REAL_MODE,
1050 .reserved = 0,
1051 .real_base = cpu_to_be32(0xffffffff),
1052 .real_size = cpu_to_be32(0xffffffff),
1053 .virt_base = cpu_to_be32(0xffffffff),
1054 .virt_size = cpu_to_be32(0xffffffff),
1055 .load_base = cpu_to_be32(0xffffffff),
1056 .min_rma = cpu_to_be32(512), /* 512MB min RMA */
1057 .min_load = cpu_to_be32(0xffffffff), /* full client load */
1058 .min_rma_percent = 0, /* min RMA percentage of total RAM */
1059 .max_pft_size = 48, /* max log_2(hash table size) */
1060 },
1061
1062 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
1063 /* option vector 3: processor options supported */
1064 .vec3 = {
1065 .byte1 = 0, /* don't ignore, don't halt */
1066 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
1067 },
1068
1069 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
1070 /* option vector 4: IBM PAPR implementation */
1071 .vec4 = {
1072 .byte1 = 0, /* don't halt */
1073 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
1074 },
1075
1076 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
1077 /* option vector 5: PAPR/OF options */
1078 .vec5 = {
1079 .byte1 = 0, /* don't ignore, don't halt */
1080 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
1081 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
1082#ifdef CONFIG_PCI_MSI
1083 /* PCIe/MSI support. Without MSI full PCIe is not supported */
1084 OV5_FEAT(OV5_MSI),
1085#else
1086 0,
1087#endif
1088 .byte3 = 0,
1089 .cmo =
1090#ifdef CONFIG_PPC_SMLPAR
1091 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
1092#else
1093 0,
1094#endif
1095 .associativity = OV5_FEAT(OV5_FORM1_AFFINITY) | OV5_FEAT(OV5_PRRN) |
1096 OV5_FEAT(OV5_FORM2_AFFINITY),
1097 .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
1098 .micro_checkpoint = 0,
1099 .reserved0 = 0,
1100 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
1101 .papr_level = 0,
1102 .reserved1 = 0,
1103 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
1104 .reserved2 = 0,
1105 .reserved3 = 0,
1106 .subprocessors = 1,
1107 .byte22 = OV5_FEAT(OV5_DRMEM_V2) | OV5_FEAT(OV5_DRC_INFO),
1108 .intarch = 0,
1109 .mmu = 0,
1110 .hash_ext = 0,
1111 .radix_ext = 0,
1112 },
1113
1114 /* option vector 6: IBM PAPR hints */
1115 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
1116 .vec6 = {
1117 .reserved = 0,
1118 .secondary_pteg = 0,
1119 .os_name = OV6_LINUX,
1120 },
1121
1122 /* option vector 7: OS Identification */
1123 .vec7_len = VECTOR_LENGTH(sizeof(struct option_vector7)),
1124};
1125
1126static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
1127
1128/* Old method - ELF header with PT_NOTE sections only works on BE */
1129#ifdef __BIG_ENDIAN__
1130static const struct fake_elf {
1131 Elf32_Ehdr elfhdr;
1132 Elf32_Phdr phdr[2];
1133 struct chrpnote {
1134 u32 namesz;
1135 u32 descsz;
1136 u32 type;
1137 char name[8]; /* "PowerPC" */
1138 struct chrpdesc {
1139 u32 real_mode;
1140 u32 real_base;
1141 u32 real_size;
1142 u32 virt_base;
1143 u32 virt_size;
1144 u32 load_base;
1145 } chrpdesc;
1146 } chrpnote;
1147 struct rpanote {
1148 u32 namesz;
1149 u32 descsz;
1150 u32 type;
1151 char name[24]; /* "IBM,RPA-Client-Config" */
1152 struct rpadesc {
1153 u32 lpar_affinity;
1154 u32 min_rmo_size;
1155 u32 min_rmo_percent;
1156 u32 max_pft_size;
1157 u32 splpar;
1158 u32 min_load;
1159 u32 new_mem_def;
1160 u32 ignore_me;
1161 } rpadesc;
1162 } rpanote;
1163} fake_elf __initconst = {
1164 .elfhdr = {
1165 .e_ident = { 0x7f, 'E', 'L', 'F',
1166 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
1167 .e_type = ET_EXEC, /* yeah right */
1168 .e_machine = EM_PPC,
1169 .e_version = EV_CURRENT,
1170 .e_phoff = offsetof(struct fake_elf, phdr),
1171 .e_phentsize = sizeof(Elf32_Phdr),
1172 .e_phnum = 2
1173 },
1174 .phdr = {
1175 [0] = {
1176 .p_type = PT_NOTE,
1177 .p_offset = offsetof(struct fake_elf, chrpnote),
1178 .p_filesz = sizeof(struct chrpnote)
1179 }, [1] = {
1180 .p_type = PT_NOTE,
1181 .p_offset = offsetof(struct fake_elf, rpanote),
1182 .p_filesz = sizeof(struct rpanote)
1183 }
1184 },
1185 .chrpnote = {
1186 .namesz = sizeof("PowerPC"),
1187 .descsz = sizeof(struct chrpdesc),
1188 .type = 0x1275,
1189 .name = "PowerPC",
1190 .chrpdesc = {
1191 .real_mode = ~0U, /* ~0 means "don't care" */
1192 .real_base = ~0U,
1193 .real_size = ~0U,
1194 .virt_base = ~0U,
1195 .virt_size = ~0U,
1196 .load_base = ~0U
1197 },
1198 },
1199 .rpanote = {
1200 .namesz = sizeof("IBM,RPA-Client-Config"),
1201 .descsz = sizeof(struct rpadesc),
1202 .type = 0x12759999,
1203 .name = "IBM,RPA-Client-Config",
1204 .rpadesc = {
1205 .lpar_affinity = 0,
1206 .min_rmo_size = 64, /* in megabytes */
1207 .min_rmo_percent = 0,
1208 .max_pft_size = 48, /* 2^48 bytes max PFT size */
1209 .splpar = 1,
1210 .min_load = ~0U,
1211 .new_mem_def = 0
1212 }
1213 }
1214};
1215#endif /* __BIG_ENDIAN__ */
1216
1217static int __init prom_count_smt_threads(void)
1218{
1219 phandle node;
1220 char type[64];
1221 unsigned int plen;
1222
1223 /* Pick up th first CPU node we can find */
1224 for (node = 0; prom_next_node(&node); ) {
1225 type[0] = 0;
1226 prom_getprop(node, "device_type", type, sizeof(type));
1227
1228 if (prom_strcmp(type, "cpu"))
1229 continue;
1230 /*
1231 * There is an entry for each smt thread, each entry being
1232 * 4 bytes long. All cpus should have the same number of
1233 * smt threads, so return after finding the first.
1234 */
1235 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
1236 if (plen == PROM_ERROR)
1237 break;
1238 plen >>= 2;
1239 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
1240
1241 /* Sanity check */
1242 if (plen < 1 || plen > 64) {
1243 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
1244 (unsigned long)plen);
1245 return 1;
1246 }
1247 return plen;
1248 }
1249 prom_debug("No threads found, assuming 1 per core\n");
1250
1251 return 1;
1252
1253}
1254
1255static void __init prom_parse_mmu_model(u8 val,
1256 struct platform_support *support)
1257{
1258 switch (val) {
1259 case OV5_FEAT(OV5_MMU_DYNAMIC):
1260 case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
1261 prom_debug("MMU - either supported\n");
1262 support->radix_mmu = !prom_radix_disable;
1263 support->hash_mmu = true;
1264 break;
1265 case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
1266 prom_debug("MMU - radix only\n");
1267 if (prom_radix_disable) {
1268 /*
1269 * If we __have__ to do radix, we're better off ignoring
1270 * the command line rather than not booting.
1271 */
1272 prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
1273 }
1274 support->radix_mmu = true;
1275 break;
1276 case OV5_FEAT(OV5_MMU_HASH):
1277 prom_debug("MMU - hash only\n");
1278 support->hash_mmu = true;
1279 break;
1280 default:
1281 prom_debug("Unknown mmu support option: 0x%x\n", val);
1282 break;
1283 }
1284}
1285
1286static void __init prom_parse_xive_model(u8 val,
1287 struct platform_support *support)
1288{
1289 switch (val) {
1290 case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
1291 prom_debug("XIVE - either mode supported\n");
1292 support->xive = !prom_xive_disable;
1293 break;
1294 case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
1295 prom_debug("XIVE - exploitation mode supported\n");
1296 if (prom_xive_disable) {
1297 /*
1298 * If we __have__ to do XIVE, we're better off ignoring
1299 * the command line rather than not booting.
1300 */
1301 prom_printf("WARNING: Ignoring cmdline option xive=off\n");
1302 }
1303 support->xive = true;
1304 break;
1305 case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
1306 prom_debug("XIVE - legacy mode supported\n");
1307 break;
1308 default:
1309 prom_debug("Unknown xive support option: 0x%x\n", val);
1310 break;
1311 }
1312}
1313
1314static void __init prom_parse_platform_support(u8 index, u8 val,
1315 struct platform_support *support)
1316{
1317 switch (index) {
1318 case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
1319 prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
1320 break;
1321 case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
1322 if (val & OV5_FEAT(OV5_RADIX_GTSE))
1323 support->radix_gtse = !prom_radix_gtse_disable;
1324 break;
1325 case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
1326 prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
1327 support);
1328 break;
1329 }
1330}
1331
1332static void __init prom_check_platform_support(void)
1333{
1334 struct platform_support supported = {
1335 .hash_mmu = false,
1336 .radix_mmu = false,
1337 .radix_gtse = false,
1338 .xive = false
1339 };
1340 int prop_len = prom_getproplen(prom.chosen,
1341 "ibm,arch-vec-5-platform-support");
1342
1343 /*
1344 * First copy the architecture vec template
1345 *
1346 * use memcpy() instead of *vec = *vec_template so that GCC replaces it
1347 * by __memcpy() when KASAN is active
1348 */
1349 memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
1350 sizeof(ibm_architecture_vec));
1351
1352 prom_strscpy_pad(ibm_architecture_vec.vec7.os_id, linux_banner, 256);
1353
1354 if (prop_len > 1) {
1355 int i;
1356 u8 vec[8];
1357 prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
1358 prop_len);
1359 if (prop_len > sizeof(vec))
1360 prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
1361 prop_len);
1362 prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support", &vec, sizeof(vec));
1363 for (i = 0; i < prop_len; i += 2) {
1364 prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2, vec[i], vec[i + 1]);
1365 prom_parse_platform_support(vec[i], vec[i + 1], &supported);
1366 }
1367 }
1368
1369 if (supported.radix_mmu && IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
1370 /* Radix preferred - Check if GTSE is also supported */
1371 prom_debug("Asking for radix\n");
1372 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
1373 if (supported.radix_gtse)
1374 ibm_architecture_vec.vec5.radix_ext =
1375 OV5_FEAT(OV5_RADIX_GTSE);
1376 else
1377 prom_debug("Radix GTSE isn't supported\n");
1378 } else if (supported.hash_mmu) {
1379 /* Default to hash mmu (if we can) */
1380 prom_debug("Asking for hash\n");
1381 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
1382 } else {
1383 /* We're probably on a legacy hypervisor */
1384 prom_debug("Assuming legacy hash support\n");
1385 }
1386
1387 if (supported.xive) {
1388 prom_debug("Asking for XIVE\n");
1389 ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
1390 }
1391}
1392
1393static void __init prom_send_capabilities(void)
1394{
1395 ihandle root;
1396 prom_arg_t ret;
1397 u32 cores;
1398
1399 /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
1400 prom_check_platform_support();
1401
1402 root = call_prom("open", 1, 1, ADDR("/"));
1403 if (root != 0) {
1404 /* We need to tell the FW about the number of cores we support.
1405 *
1406 * To do that, we count the number of threads on the first core
1407 * (we assume this is the same for all cores) and use it to
1408 * divide NR_CPUS.
1409 */
1410
1411 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
1412 prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
1413 cores, NR_CPUS);
1414
1415 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
1416
1417 /* try calling the ibm,client-architecture-support method */
1418 prom_printf("Calling ibm,client-architecture-support...");
1419 if (call_prom_ret("call-method", 3, 2, &ret,
1420 ADDR("ibm,client-architecture-support"),
1421 root,
1422 ADDR(&ibm_architecture_vec)) == 0) {
1423 /* the call exists... */
1424 if (ret)
1425 prom_printf("\nWARNING: ibm,client-architecture"
1426 "-support call FAILED!\n");
1427 call_prom("close", 1, 0, root);
1428 prom_printf(" done\n");
1429 return;
1430 }
1431 call_prom("close", 1, 0, root);
1432 prom_printf(" not implemented\n");
1433 }
1434
1435#ifdef __BIG_ENDIAN__
1436 {
1437 ihandle elfloader;
1438
1439 /* no ibm,client-architecture-support call, try the old way */
1440 elfloader = call_prom("open", 1, 1,
1441 ADDR("/packages/elf-loader"));
1442 if (elfloader == 0) {
1443 prom_printf("couldn't open /packages/elf-loader\n");
1444 return;
1445 }
1446 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1447 elfloader, ADDR(&fake_elf));
1448 call_prom("close", 1, 0, elfloader);
1449 }
1450#endif /* __BIG_ENDIAN__ */
1451}
1452#endif /* CONFIG_PPC_PSERIES */
1453
1454/*
1455 * Memory allocation strategy... our layout is normally:
1456 *
1457 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1458 * rare cases, initrd might end up being before the kernel though.
1459 * We assume this won't override the final kernel at 0, we have no
1460 * provision to handle that in this version, but it should hopefully
1461 * never happen.
1462 *
1463 * alloc_top is set to the top of RMO, eventually shrink down if the
1464 * TCEs overlap
1465 *
1466 * alloc_bottom is set to the top of kernel/initrd
1467 *
1468 * from there, allocations are done this way : rtas is allocated
1469 * topmost, and the device-tree is allocated from the bottom. We try
1470 * to grow the device-tree allocation as we progress. If we can't,
1471 * then we fail, we don't currently have a facility to restart
1472 * elsewhere, but that shouldn't be necessary.
1473 *
1474 * Note that calls to reserve_mem have to be done explicitly, memory
1475 * allocated with either alloc_up or alloc_down isn't automatically
1476 * reserved.
1477 */
1478
1479
1480/*
1481 * Allocates memory in the RMO upward from the kernel/initrd
1482 *
1483 * When align is 0, this is a special case, it means to allocate in place
1484 * at the current location of alloc_bottom or fail (that is basically
1485 * extending the previous allocation). Used for the device-tree flattening
1486 */
1487static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1488{
1489 unsigned long base = alloc_bottom;
1490 unsigned long addr = 0;
1491
1492 if (align)
1493 base = ALIGN(base, align);
1494 prom_debug("%s(%lx, %lx)\n", __func__, size, align);
1495 if (ram_top == 0)
1496 prom_panic("alloc_up() called with mem not initialized\n");
1497
1498 if (align)
1499 base = ALIGN(alloc_bottom, align);
1500 else
1501 base = alloc_bottom;
1502
1503 for(; (base + size) <= alloc_top;
1504 base = ALIGN(base + 0x100000, align)) {
1505 prom_debug(" trying: 0x%lx\n\r", base);
1506 addr = (unsigned long)prom_claim(base, size, 0);
1507 if (addr != PROM_ERROR && addr != 0)
1508 break;
1509 addr = 0;
1510 if (align == 0)
1511 break;
1512 }
1513 if (addr == 0)
1514 return 0;
1515 alloc_bottom = addr + size;
1516
1517 prom_debug(" -> %lx\n", addr);
1518 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1519 prom_debug(" alloc_top : %lx\n", alloc_top);
1520 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1521 prom_debug(" rmo_top : %lx\n", rmo_top);
1522 prom_debug(" ram_top : %lx\n", ram_top);
1523
1524 return addr;
1525}
1526
1527/*
1528 * Allocates memory downward, either from top of RMO, or if highmem
1529 * is set, from the top of RAM. Note that this one doesn't handle
1530 * failures. It does claim memory if highmem is not set.
1531 */
1532static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1533 int highmem)
1534{
1535 unsigned long base, addr = 0;
1536
1537 prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
1538 highmem ? "(high)" : "(low)");
1539 if (ram_top == 0)
1540 prom_panic("alloc_down() called with mem not initialized\n");
1541
1542 if (highmem) {
1543 /* Carve out storage for the TCE table. */
1544 addr = ALIGN_DOWN(alloc_top_high - size, align);
1545 if (addr <= alloc_bottom)
1546 return 0;
1547 /* Will we bump into the RMO ? If yes, check out that we
1548 * didn't overlap existing allocations there, if we did,
1549 * we are dead, we must be the first in town !
1550 */
1551 if (addr < rmo_top) {
1552 /* Good, we are first */
1553 if (alloc_top == rmo_top)
1554 alloc_top = rmo_top = addr;
1555 else
1556 return 0;
1557 }
1558 alloc_top_high = addr;
1559 goto bail;
1560 }
1561
1562 base = ALIGN_DOWN(alloc_top - size, align);
1563 for (; base > alloc_bottom;
1564 base = ALIGN_DOWN(base - 0x100000, align)) {
1565 prom_debug(" trying: 0x%lx\n\r", base);
1566 addr = (unsigned long)prom_claim(base, size, 0);
1567 if (addr != PROM_ERROR && addr != 0)
1568 break;
1569 addr = 0;
1570 }
1571 if (addr == 0)
1572 return 0;
1573 alloc_top = addr;
1574
1575 bail:
1576 prom_debug(" -> %lx\n", addr);
1577 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1578 prom_debug(" alloc_top : %lx\n", alloc_top);
1579 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1580 prom_debug(" rmo_top : %lx\n", rmo_top);
1581 prom_debug(" ram_top : %lx\n", ram_top);
1582
1583 return addr;
1584}
1585
1586/*
1587 * Parse a "reg" cell
1588 */
1589static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1590{
1591 cell_t *p = *cellp;
1592 unsigned long r = 0;
1593
1594 /* Ignore more than 2 cells */
1595 while (s > sizeof(unsigned long) / 4) {
1596 p++;
1597 s--;
1598 }
1599 r = be32_to_cpu(*p++);
1600#ifdef CONFIG_PPC64
1601 if (s > 1) {
1602 r <<= 32;
1603 r |= be32_to_cpu(*(p++));
1604 }
1605#endif
1606 *cellp = p;
1607 return r;
1608}
1609
1610/*
1611 * Very dumb function for adding to the memory reserve list, but
1612 * we don't need anything smarter at this point
1613 *
1614 * XXX Eventually check for collisions. They should NEVER happen.
1615 * If problems seem to show up, it would be a good start to track
1616 * them down.
1617 */
1618static void __init reserve_mem(u64 base, u64 size)
1619{
1620 u64 top = base + size;
1621 unsigned long cnt = mem_reserve_cnt;
1622
1623 if (size == 0)
1624 return;
1625
1626 /* We need to always keep one empty entry so that we
1627 * have our terminator with "size" set to 0 since we are
1628 * dumb and just copy this entire array to the boot params
1629 */
1630 base = ALIGN_DOWN(base, PAGE_SIZE);
1631 top = ALIGN(top, PAGE_SIZE);
1632 size = top - base;
1633
1634 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1635 prom_panic("Memory reserve map exhausted !\n");
1636 mem_reserve_map[cnt].base = cpu_to_be64(base);
1637 mem_reserve_map[cnt].size = cpu_to_be64(size);
1638 mem_reserve_cnt = cnt + 1;
1639}
1640
1641/*
1642 * Initialize memory allocation mechanism, parse "memory" nodes and
1643 * obtain that way the top of memory and RMO to setup out local allocator
1644 */
1645static void __init prom_init_mem(void)
1646{
1647 phandle node;
1648 char type[64];
1649 unsigned int plen;
1650 cell_t *p, *endp;
1651 __be32 val;
1652 u32 rac, rsc;
1653
1654 /*
1655 * We iterate the memory nodes to find
1656 * 1) top of RMO (first node)
1657 * 2) top of memory
1658 */
1659 val = cpu_to_be32(2);
1660 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1661 rac = be32_to_cpu(val);
1662 val = cpu_to_be32(1);
1663 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1664 rsc = be32_to_cpu(val);
1665 prom_debug("root_addr_cells: %x\n", rac);
1666 prom_debug("root_size_cells: %x\n", rsc);
1667
1668 prom_debug("scanning memory:\n");
1669
1670 for (node = 0; prom_next_node(&node); ) {
1671 type[0] = 0;
1672 prom_getprop(node, "device_type", type, sizeof(type));
1673
1674 if (type[0] == 0) {
1675 /*
1676 * CHRP Longtrail machines have no device_type
1677 * on the memory node, so check the name instead...
1678 */
1679 prom_getprop(node, "name", type, sizeof(type));
1680 }
1681 if (prom_strcmp(type, "memory"))
1682 continue;
1683
1684 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1685 if (plen > sizeof(regbuf)) {
1686 prom_printf("memory node too large for buffer !\n");
1687 plen = sizeof(regbuf);
1688 }
1689 p = regbuf;
1690 endp = p + (plen / sizeof(cell_t));
1691
1692#ifdef DEBUG_PROM
1693 memset(prom_scratch, 0, sizeof(prom_scratch));
1694 call_prom("package-to-path", 3, 1, node, prom_scratch,
1695 sizeof(prom_scratch) - 1);
1696 prom_debug(" node %s :\n", prom_scratch);
1697#endif /* DEBUG_PROM */
1698
1699 while ((endp - p) >= (rac + rsc)) {
1700 unsigned long base, size;
1701
1702 base = prom_next_cell(rac, &p);
1703 size = prom_next_cell(rsc, &p);
1704
1705 if (size == 0)
1706 continue;
1707 prom_debug(" %lx %lx\n", base, size);
1708 if (base == 0 && (of_platform & PLATFORM_LPAR))
1709 rmo_top = size;
1710 if ((base + size) > ram_top)
1711 ram_top = base + size;
1712 }
1713 }
1714
1715 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1716
1717 /*
1718 * If prom_memory_limit is set we reduce the upper limits *except* for
1719 * alloc_top_high. This must be the real top of RAM so we can put
1720 * TCE's up there.
1721 */
1722
1723 alloc_top_high = ram_top;
1724
1725 if (prom_memory_limit) {
1726 if (prom_memory_limit <= alloc_bottom) {
1727 prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
1728 prom_memory_limit);
1729 prom_memory_limit = 0;
1730 } else if (prom_memory_limit >= ram_top) {
1731 prom_printf("Ignoring mem=%lx >= ram_top.\n",
1732 prom_memory_limit);
1733 prom_memory_limit = 0;
1734 } else {
1735 ram_top = prom_memory_limit;
1736 rmo_top = min(rmo_top, prom_memory_limit);
1737 }
1738 }
1739
1740 /*
1741 * Setup our top alloc point, that is top of RMO or top of
1742 * segment 0 when running non-LPAR.
1743 * Some RS64 machines have buggy firmware where claims up at
1744 * 1GB fail. Cap at 768MB as a workaround.
1745 * Since 768MB is plenty of room, and we need to cap to something
1746 * reasonable on 32-bit, cap at 768MB on all machines.
1747 */
1748 if (!rmo_top)
1749 rmo_top = ram_top;
1750 rmo_top = min(0x30000000ul, rmo_top);
1751 alloc_top = rmo_top;
1752 alloc_top_high = ram_top;
1753
1754 /*
1755 * Check if we have an initrd after the kernel but still inside
1756 * the RMO. If we do move our bottom point to after it.
1757 */
1758 if (prom_initrd_start &&
1759 prom_initrd_start < rmo_top &&
1760 prom_initrd_end > alloc_bottom)
1761 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1762
1763 prom_printf("memory layout at init:\n");
1764 prom_printf(" memory_limit : %lx (16 MB aligned)\n",
1765 prom_memory_limit);
1766 prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
1767 prom_printf(" alloc_top : %lx\n", alloc_top);
1768 prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
1769 prom_printf(" rmo_top : %lx\n", rmo_top);
1770 prom_printf(" ram_top : %lx\n", ram_top);
1771}
1772
1773static void __init prom_close_stdin(void)
1774{
1775 __be32 val;
1776 ihandle stdin;
1777
1778 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1779 stdin = be32_to_cpu(val);
1780 call_prom("close", 1, 0, stdin);
1781 }
1782}
1783
1784#ifdef CONFIG_PPC_SVM
1785static int __init prom_rtas_hcall(uint64_t args)
1786{
1787 register uint64_t arg1 asm("r3") = H_RTAS;
1788 register uint64_t arg2 asm("r4") = args;
1789
1790 asm volatile("sc 1\n" : "=r" (arg1) :
1791 "r" (arg1),
1792 "r" (arg2) :);
1793 srr_regs_clobbered();
1794
1795 return arg1;
1796}
1797
1798static struct rtas_args __prombss os_term_args;
1799
1800static void __init prom_rtas_os_term(char *str)
1801{
1802 phandle rtas_node;
1803 __be32 val;
1804 u32 token;
1805
1806 prom_debug("%s: start...\n", __func__);
1807 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1808 prom_debug("rtas_node: %x\n", rtas_node);
1809 if (!PHANDLE_VALID(rtas_node))
1810 return;
1811
1812 val = 0;
1813 prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
1814 token = be32_to_cpu(val);
1815 prom_debug("ibm,os-term: %x\n", token);
1816 if (token == 0)
1817 prom_panic("Could not get token for ibm,os-term\n");
1818 os_term_args.token = cpu_to_be32(token);
1819 os_term_args.nargs = cpu_to_be32(1);
1820 os_term_args.nret = cpu_to_be32(1);
1821 os_term_args.args[0] = cpu_to_be32(__pa(str));
1822 prom_rtas_hcall((uint64_t)&os_term_args);
1823}
1824#endif /* CONFIG_PPC_SVM */
1825
1826/*
1827 * Allocate room for and instantiate RTAS
1828 */
1829static void __init prom_instantiate_rtas(void)
1830{
1831 phandle rtas_node;
1832 ihandle rtas_inst;
1833 u32 base, entry = 0;
1834 __be32 val;
1835 u32 size = 0;
1836
1837 prom_debug("prom_instantiate_rtas: start...\n");
1838
1839 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1840 prom_debug("rtas_node: %x\n", rtas_node);
1841 if (!PHANDLE_VALID(rtas_node))
1842 return;
1843
1844 val = 0;
1845 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1846 size = be32_to_cpu(val);
1847 if (size == 0)
1848 return;
1849
1850 base = alloc_down(size, PAGE_SIZE, 0);
1851 if (base == 0)
1852 prom_panic("Could not allocate memory for RTAS\n");
1853
1854 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1855 if (!IHANDLE_VALID(rtas_inst)) {
1856 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1857 return;
1858 }
1859
1860 prom_printf("instantiating rtas at 0x%x...", base);
1861
1862 if (call_prom_ret("call-method", 3, 2, &entry,
1863 ADDR("instantiate-rtas"),
1864 rtas_inst, base) != 0
1865 || entry == 0) {
1866 prom_printf(" failed\n");
1867 return;
1868 }
1869 prom_printf(" done\n");
1870
1871 reserve_mem(base, size);
1872
1873 val = cpu_to_be32(base);
1874 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1875 &val, sizeof(val));
1876 val = cpu_to_be32(entry);
1877 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1878 &val, sizeof(val));
1879
1880 /* Check if it supports "query-cpu-stopped-state" */
1881 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1882 &val, sizeof(val)) != PROM_ERROR)
1883 rtas_has_query_cpu_stopped = true;
1884
1885 prom_debug("rtas base = 0x%x\n", base);
1886 prom_debug("rtas entry = 0x%x\n", entry);
1887 prom_debug("rtas size = 0x%x\n", size);
1888
1889 prom_debug("prom_instantiate_rtas: end...\n");
1890}
1891
1892#ifdef CONFIG_PPC64
1893/*
1894 * Allocate room for and instantiate Stored Measurement Log (SML)
1895 */
1896static void __init prom_instantiate_sml(void)
1897{
1898 phandle ibmvtpm_node;
1899 ihandle ibmvtpm_inst;
1900 u32 entry = 0, size = 0, succ = 0;
1901 u64 base;
1902 __be32 val;
1903
1904 prom_debug("prom_instantiate_sml: start...\n");
1905
1906 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1907 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1908 if (!PHANDLE_VALID(ibmvtpm_node))
1909 return;
1910
1911 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1912 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1913 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1914 return;
1915 }
1916
1917 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1918 &val, sizeof(val)) != PROM_ERROR) {
1919 if (call_prom_ret("call-method", 2, 2, &succ,
1920 ADDR("reformat-sml-to-efi-alignment"),
1921 ibmvtpm_inst) != 0 || succ == 0) {
1922 prom_printf("Reformat SML to EFI alignment failed\n");
1923 return;
1924 }
1925
1926 if (call_prom_ret("call-method", 2, 2, &size,
1927 ADDR("sml-get-allocated-size"),
1928 ibmvtpm_inst) != 0 || size == 0) {
1929 prom_printf("SML get allocated size failed\n");
1930 return;
1931 }
1932 } else {
1933 if (call_prom_ret("call-method", 2, 2, &size,
1934 ADDR("sml-get-handover-size"),
1935 ibmvtpm_inst) != 0 || size == 0) {
1936 prom_printf("SML get handover size failed\n");
1937 return;
1938 }
1939 }
1940
1941 base = alloc_down(size, PAGE_SIZE, 0);
1942 if (base == 0)
1943 prom_panic("Could not allocate memory for sml\n");
1944
1945 prom_printf("instantiating sml at 0x%llx...", base);
1946
1947 memset((void *)base, 0, size);
1948
1949 if (call_prom_ret("call-method", 4, 2, &entry,
1950 ADDR("sml-handover"),
1951 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1952 prom_printf("SML handover failed\n");
1953 return;
1954 }
1955 prom_printf(" done\n");
1956
1957 reserve_mem(base, size);
1958
1959 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1960 &base, sizeof(base));
1961 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1962 &size, sizeof(size));
1963
1964 prom_debug("sml base = 0x%llx\n", base);
1965 prom_debug("sml size = 0x%x\n", size);
1966
1967 prom_debug("prom_instantiate_sml: end...\n");
1968}
1969
1970/*
1971 * Allocate room for and initialize TCE tables
1972 */
1973#ifdef __BIG_ENDIAN__
1974static void __init prom_initialize_tce_table(void)
1975{
1976 phandle node;
1977 ihandle phb_node;
1978 char compatible[64], type[64], model[64];
1979 char *path = prom_scratch;
1980 u64 base, align;
1981 u32 minalign, minsize;
1982 u64 tce_entry, *tce_entryp;
1983 u64 local_alloc_top, local_alloc_bottom;
1984 u64 i;
1985
1986 if (prom_iommu_off)
1987 return;
1988
1989 prom_debug("starting prom_initialize_tce_table\n");
1990
1991 /* Cache current top of allocs so we reserve a single block */
1992 local_alloc_top = alloc_top_high;
1993 local_alloc_bottom = local_alloc_top;
1994
1995 /* Search all nodes looking for PHBs. */
1996 for (node = 0; prom_next_node(&node); ) {
1997 compatible[0] = 0;
1998 type[0] = 0;
1999 model[0] = 0;
2000 prom_getprop(node, "compatible",
2001 compatible, sizeof(compatible));
2002 prom_getprop(node, "device_type", type, sizeof(type));
2003 prom_getprop(node, "model", model, sizeof(model));
2004
2005 if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
2006 continue;
2007
2008 /* Keep the old logic intact to avoid regression. */
2009 if (compatible[0] != 0) {
2010 if ((prom_strstr(compatible, "python") == NULL) &&
2011 (prom_strstr(compatible, "Speedwagon") == NULL) &&
2012 (prom_strstr(compatible, "Winnipeg") == NULL))
2013 continue;
2014 } else if (model[0] != 0) {
2015 if ((prom_strstr(model, "ython") == NULL) &&
2016 (prom_strstr(model, "peedwagon") == NULL) &&
2017 (prom_strstr(model, "innipeg") == NULL))
2018 continue;
2019 }
2020
2021 if (prom_getprop(node, "tce-table-minalign", &minalign,
2022 sizeof(minalign)) == PROM_ERROR)
2023 minalign = 0;
2024 if (prom_getprop(node, "tce-table-minsize", &minsize,
2025 sizeof(minsize)) == PROM_ERROR)
2026 minsize = 4UL << 20;
2027
2028 /*
2029 * Even though we read what OF wants, we just set the table
2030 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
2031 * By doing this, we avoid the pitfalls of trying to DMA to
2032 * MMIO space and the DMA alias hole.
2033 */
2034 minsize = 4UL << 20;
2035
2036 /* Align to the greater of the align or size */
2037 align = max(minalign, minsize);
2038 base = alloc_down(minsize, align, 1);
2039 if (base == 0)
2040 prom_panic("ERROR, cannot find space for TCE table.\n");
2041 if (base < local_alloc_bottom)
2042 local_alloc_bottom = base;
2043
2044 /* It seems OF doesn't null-terminate the path :-( */
2045 memset(path, 0, sizeof(prom_scratch));
2046 /* Call OF to setup the TCE hardware */
2047 if (call_prom("package-to-path", 3, 1, node,
2048 path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
2049 prom_printf("package-to-path failed\n");
2050 }
2051
2052 /* Save away the TCE table attributes for later use. */
2053 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
2054 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
2055
2056 prom_debug("TCE table: %s\n", path);
2057 prom_debug("\tnode = 0x%x\n", node);
2058 prom_debug("\tbase = 0x%llx\n", base);
2059 prom_debug("\tsize = 0x%x\n", minsize);
2060
2061 /* Initialize the table to have a one-to-one mapping
2062 * over the allocated size.
2063 */
2064 tce_entryp = (u64 *)base;
2065 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
2066 tce_entry = (i << PAGE_SHIFT);
2067 tce_entry |= 0x3;
2068 *tce_entryp = tce_entry;
2069 }
2070
2071 prom_printf("opening PHB %s", path);
2072 phb_node = call_prom("open", 1, 1, path);
2073 if (phb_node == 0)
2074 prom_printf("... failed\n");
2075 else
2076 prom_printf("... done\n");
2077
2078 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
2079 phb_node, -1, minsize,
2080 (u32) base, (u32) (base >> 32));
2081 call_prom("close", 1, 0, phb_node);
2082 }
2083
2084 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
2085
2086 /* These are only really needed if there is a memory limit in
2087 * effect, but we don't know so export them always. */
2088 prom_tce_alloc_start = local_alloc_bottom;
2089 prom_tce_alloc_end = local_alloc_top;
2090
2091 /* Flag the first invalid entry */
2092 prom_debug("ending prom_initialize_tce_table\n");
2093}
2094#endif /* __BIG_ENDIAN__ */
2095#endif /* CONFIG_PPC64 */
2096
2097/*
2098 * With CHRP SMP we need to use the OF to start the other processors.
2099 * We can't wait until smp_boot_cpus (the OF is trashed by then)
2100 * so we have to put the processors into a holding pattern controlled
2101 * by the kernel (not OF) before we destroy the OF.
2102 *
2103 * This uses a chunk of low memory, puts some holding pattern
2104 * code there and sends the other processors off to there until
2105 * smp_boot_cpus tells them to do something. The holding pattern
2106 * checks that address until its cpu # is there, when it is that
2107 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
2108 * of setting those values.
2109 *
2110 * We also use physical address 0x4 here to tell when a cpu
2111 * is in its holding pattern code.
2112 *
2113 * -- Cort
2114 */
2115/*
2116 * We want to reference the copy of __secondary_hold_* in the
2117 * 0 - 0x100 address range
2118 */
2119#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
2120
2121static void __init prom_hold_cpus(void)
2122{
2123 unsigned long i;
2124 phandle node;
2125 char type[64];
2126 unsigned long *spinloop
2127 = (void *) LOW_ADDR(__secondary_hold_spinloop);
2128 unsigned long *acknowledge
2129 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
2130 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
2131
2132 /*
2133 * On pseries, if RTAS supports "query-cpu-stopped-state",
2134 * we skip this stage, the CPUs will be started by the
2135 * kernel using RTAS.
2136 */
2137 if ((of_platform == PLATFORM_PSERIES ||
2138 of_platform == PLATFORM_PSERIES_LPAR) &&
2139 rtas_has_query_cpu_stopped) {
2140 prom_printf("prom_hold_cpus: skipped\n");
2141 return;
2142 }
2143
2144 prom_debug("prom_hold_cpus: start...\n");
2145 prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
2146 prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
2147 prom_debug(" 1) acknowledge = 0x%lx\n",
2148 (unsigned long)acknowledge);
2149 prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
2150 prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
2151
2152 /* Set the common spinloop variable, so all of the secondary cpus
2153 * will block when they are awakened from their OF spinloop.
2154 * This must occur for both SMP and non SMP kernels, since OF will
2155 * be trashed when we move the kernel.
2156 */
2157 *spinloop = 0;
2158
2159 /* look for cpus */
2160 for (node = 0; prom_next_node(&node); ) {
2161 unsigned int cpu_no;
2162 __be32 reg;
2163
2164 type[0] = 0;
2165 prom_getprop(node, "device_type", type, sizeof(type));
2166 if (prom_strcmp(type, "cpu") != 0)
2167 continue;
2168
2169 /* Skip non-configured cpus. */
2170 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
2171 if (prom_strcmp(type, "okay") != 0)
2172 continue;
2173
2174 reg = cpu_to_be32(-1); /* make sparse happy */
2175 prom_getprop(node, "reg", ®, sizeof(reg));
2176 cpu_no = be32_to_cpu(reg);
2177
2178 prom_debug("cpu hw idx = %u\n", cpu_no);
2179
2180 /* Init the acknowledge var which will be reset by
2181 * the secondary cpu when it awakens from its OF
2182 * spinloop.
2183 */
2184 *acknowledge = (unsigned long)-1;
2185
2186 if (cpu_no != prom.cpu) {
2187 /* Primary Thread of non-boot cpu or any thread */
2188 prom_printf("starting cpu hw idx %u... ", cpu_no);
2189 call_prom("start-cpu", 3, 0, node,
2190 secondary_hold, cpu_no);
2191
2192 for (i = 0; (i < 100000000) &&
2193 (*acknowledge == ((unsigned long)-1)); i++ )
2194 mb();
2195
2196 if (*acknowledge == cpu_no)
2197 prom_printf("done\n");
2198 else
2199 prom_printf("failed: %lx\n", *acknowledge);
2200 }
2201#ifdef CONFIG_SMP
2202 else
2203 prom_printf("boot cpu hw idx %u\n", cpu_no);
2204#endif /* CONFIG_SMP */
2205 }
2206
2207 prom_debug("prom_hold_cpus: end...\n");
2208}
2209
2210
2211static void __init prom_init_client_services(unsigned long pp)
2212{
2213 /* Get a handle to the prom entry point before anything else */
2214 prom_entry = pp;
2215
2216 /* get a handle for the stdout device */
2217 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
2218 if (!PHANDLE_VALID(prom.chosen))
2219 prom_panic("cannot find chosen"); /* msg won't be printed :( */
2220
2221 /* get device tree root */
2222 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
2223 if (!PHANDLE_VALID(prom.root))
2224 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
2225
2226 prom.mmumap = 0;
2227}
2228
2229#ifdef CONFIG_PPC32
2230/*
2231 * For really old powermacs, we need to map things we claim.
2232 * For that, we need the ihandle of the mmu.
2233 * Also, on the longtrail, we need to work around other bugs.
2234 */
2235static void __init prom_find_mmu(void)
2236{
2237 phandle oprom;
2238 char version[64];
2239
2240 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
2241 if (!PHANDLE_VALID(oprom))
2242 return;
2243 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
2244 return;
2245 version[sizeof(version) - 1] = 0;
2246 /* XXX might need to add other versions here */
2247 if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
2248 of_workarounds = OF_WA_CLAIM;
2249 else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
2250 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
2251 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
2252 } else
2253 return;
2254 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
2255 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
2256 sizeof(prom.mmumap));
2257 prom.mmumap = be32_to_cpu(prom.mmumap);
2258 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
2259 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
2260}
2261#else
2262#define prom_find_mmu()
2263#endif
2264
2265static void __init prom_init_stdout(void)
2266{
2267 char *path = of_stdout_device;
2268 char type[16];
2269 phandle stdout_node;
2270 __be32 val;
2271
2272 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
2273 prom_panic("cannot find stdout");
2274
2275 prom.stdout = be32_to_cpu(val);
2276
2277 /* Get the full OF pathname of the stdout device */
2278 memset(path, 0, 256);
2279 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
2280 prom_printf("OF stdout device is: %s\n", of_stdout_device);
2281 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
2282 path, prom_strlen(path) + 1);
2283
2284 /* instance-to-package fails on PA-Semi */
2285 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
2286 if (stdout_node != PROM_ERROR) {
2287 val = cpu_to_be32(stdout_node);
2288
2289 /* If it's a display, note it */
2290 memset(type, 0, sizeof(type));
2291 prom_getprop(stdout_node, "device_type", type, sizeof(type));
2292 if (prom_strcmp(type, "display") == 0)
2293 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
2294 }
2295}
2296
2297static int __init prom_find_machine_type(void)
2298{
2299 static char compat[256] __prombss;
2300 int len, i = 0;
2301#ifdef CONFIG_PPC64
2302 phandle rtas;
2303 int x;
2304#endif
2305
2306 /* Look for a PowerMac or a Cell */
2307 len = prom_getprop(prom.root, "compatible",
2308 compat, sizeof(compat)-1);
2309 if (len > 0) {
2310 compat[len] = 0;
2311 while (i < len) {
2312 char *p = &compat[i];
2313 int sl = prom_strlen(p);
2314 if (sl == 0)
2315 break;
2316 if (prom_strstr(p, "Power Macintosh") ||
2317 prom_strstr(p, "MacRISC"))
2318 return PLATFORM_POWERMAC;
2319#ifdef CONFIG_PPC64
2320 /* We must make sure we don't detect the IBM Cell
2321 * blades as pSeries due to some firmware issues,
2322 * so we do it here.
2323 */
2324 if (prom_strstr(p, "IBM,CBEA") ||
2325 prom_strstr(p, "IBM,CPBW-1.0"))
2326 return PLATFORM_GENERIC;
2327#endif /* CONFIG_PPC64 */
2328 i += sl + 1;
2329 }
2330 }
2331#ifdef CONFIG_PPC64
2332 /* Try to figure out if it's an IBM pSeries or any other
2333 * PAPR compliant platform. We assume it is if :
2334 * - /device_type is "chrp" (please, do NOT use that for future
2335 * non-IBM designs !
2336 * - it has /rtas
2337 */
2338 len = prom_getprop(prom.root, "device_type",
2339 compat, sizeof(compat)-1);
2340 if (len <= 0)
2341 return PLATFORM_GENERIC;
2342 if (prom_strcmp(compat, "chrp"))
2343 return PLATFORM_GENERIC;
2344
2345 /* Default to pSeries. We need to know if we are running LPAR */
2346 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
2347 if (!PHANDLE_VALID(rtas))
2348 return PLATFORM_GENERIC;
2349 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2350 if (x != PROM_ERROR) {
2351 prom_debug("Hypertas detected, assuming LPAR !\n");
2352 return PLATFORM_PSERIES_LPAR;
2353 }
2354 return PLATFORM_PSERIES;
2355#else
2356 return PLATFORM_GENERIC;
2357#endif
2358}
2359
2360static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2361{
2362 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2363}
2364
2365/*
2366 * If we have a display that we don't know how to drive,
2367 * we will want to try to execute OF's open method for it
2368 * later. However, OF will probably fall over if we do that
2369 * we've taken over the MMU.
2370 * So we check whether we will need to open the display,
2371 * and if so, open it now.
2372 */
2373static void __init prom_check_displays(void)
2374{
2375 char type[16], *path;
2376 phandle node;
2377 ihandle ih;
2378 int i;
2379
2380 static const unsigned char default_colors[] __initconst = {
2381 0x00, 0x00, 0x00,
2382 0x00, 0x00, 0xaa,
2383 0x00, 0xaa, 0x00,
2384 0x00, 0xaa, 0xaa,
2385 0xaa, 0x00, 0x00,
2386 0xaa, 0x00, 0xaa,
2387 0xaa, 0xaa, 0x00,
2388 0xaa, 0xaa, 0xaa,
2389 0x55, 0x55, 0x55,
2390 0x55, 0x55, 0xff,
2391 0x55, 0xff, 0x55,
2392 0x55, 0xff, 0xff,
2393 0xff, 0x55, 0x55,
2394 0xff, 0x55, 0xff,
2395 0xff, 0xff, 0x55,
2396 0xff, 0xff, 0xff
2397 };
2398 const unsigned char *clut;
2399
2400 prom_debug("Looking for displays\n");
2401 for (node = 0; prom_next_node(&node); ) {
2402 memset(type, 0, sizeof(type));
2403 prom_getprop(node, "device_type", type, sizeof(type));
2404 if (prom_strcmp(type, "display") != 0)
2405 continue;
2406
2407 /* It seems OF doesn't null-terminate the path :-( */
2408 path = prom_scratch;
2409 memset(path, 0, sizeof(prom_scratch));
2410
2411 /*
2412 * leave some room at the end of the path for appending extra
2413 * arguments
2414 */
2415 if (call_prom("package-to-path", 3, 1, node, path,
2416 sizeof(prom_scratch) - 10) == PROM_ERROR)
2417 continue;
2418 prom_printf("found display : %s, opening... ", path);
2419
2420 ih = call_prom("open", 1, 1, path);
2421 if (ih == 0) {
2422 prom_printf("failed\n");
2423 continue;
2424 }
2425
2426 /* Success */
2427 prom_printf("done\n");
2428 prom_setprop(node, path, "linux,opened", NULL, 0);
2429
2430 /* Setup a usable color table when the appropriate
2431 * method is available. Should update this to set-colors */
2432 clut = default_colors;
2433 for (i = 0; i < 16; i++, clut += 3)
2434 if (prom_set_color(ih, i, clut[0], clut[1],
2435 clut[2]) != 0)
2436 break;
2437
2438#ifdef CONFIG_LOGO_LINUX_CLUT224
2439 clut = PTRRELOC(logo_linux_clut224.clut);
2440 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2441 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2442 clut[2]) != 0)
2443 break;
2444#endif /* CONFIG_LOGO_LINUX_CLUT224 */
2445
2446#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2447 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2448 PROM_ERROR) {
2449 u32 width, height, pitch, addr;
2450
2451 prom_printf("Setting btext !\n");
2452
2453 if (prom_getprop(node, "width", &width, 4) == PROM_ERROR)
2454 return;
2455
2456 if (prom_getprop(node, "height", &height, 4) == PROM_ERROR)
2457 return;
2458
2459 if (prom_getprop(node, "linebytes", &pitch, 4) == PROM_ERROR)
2460 return;
2461
2462 if (prom_getprop(node, "address", &addr, 4) == PROM_ERROR)
2463 return;
2464
2465 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2466 width, height, pitch, addr);
2467 btext_setup_display(width, height, 8, pitch, addr);
2468 btext_prepare_BAT();
2469 }
2470#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2471 }
2472}
2473
2474
2475/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2476static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2477 unsigned long needed, unsigned long align)
2478{
2479 void *ret;
2480
2481 *mem_start = ALIGN(*mem_start, align);
2482 while ((*mem_start + needed) > *mem_end) {
2483 unsigned long room, chunk;
2484
2485 prom_debug("Chunk exhausted, claiming more at %lx...\n",
2486 alloc_bottom);
2487 room = alloc_top - alloc_bottom;
2488 if (room > DEVTREE_CHUNK_SIZE)
2489 room = DEVTREE_CHUNK_SIZE;
2490 if (room < PAGE_SIZE)
2491 prom_panic("No memory for flatten_device_tree "
2492 "(no room)\n");
2493 chunk = alloc_up(room, 0);
2494 if (chunk == 0)
2495 prom_panic("No memory for flatten_device_tree "
2496 "(claim failed)\n");
2497 *mem_end = chunk + room;
2498 }
2499
2500 ret = (void *)*mem_start;
2501 *mem_start += needed;
2502
2503 return ret;
2504}
2505
2506#define dt_push_token(token, mem_start, mem_end) do { \
2507 void *room = make_room(mem_start, mem_end, 4, 4); \
2508 *(__be32 *)room = cpu_to_be32(token); \
2509 } while(0)
2510
2511static unsigned long __init dt_find_string(char *str)
2512{
2513 char *s, *os;
2514
2515 s = os = (char *)dt_string_start;
2516 s += 4;
2517 while (s < (char *)dt_string_end) {
2518 if (prom_strcmp(s, str) == 0)
2519 return s - os;
2520 s += prom_strlen(s) + 1;
2521 }
2522 return 0;
2523}
2524
2525/*
2526 * The Open Firmware 1275 specification states properties must be 31 bytes or
2527 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2528 */
2529#define MAX_PROPERTY_NAME 64
2530
2531static void __init scan_dt_build_strings(phandle node,
2532 unsigned long *mem_start,
2533 unsigned long *mem_end)
2534{
2535 char *prev_name, *namep, *sstart;
2536 unsigned long soff;
2537 phandle child;
2538
2539 sstart = (char *)dt_string_start;
2540
2541 /* get and store all property names */
2542 prev_name = "";
2543 for (;;) {
2544 /* 64 is max len of name including nul. */
2545 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2546 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2547 /* No more nodes: unwind alloc */
2548 *mem_start = (unsigned long)namep;
2549 break;
2550 }
2551
2552 /* skip "name" */
2553 if (prom_strcmp(namep, "name") == 0) {
2554 *mem_start = (unsigned long)namep;
2555 prev_name = "name";
2556 continue;
2557 }
2558 /* get/create string entry */
2559 soff = dt_find_string(namep);
2560 if (soff != 0) {
2561 *mem_start = (unsigned long)namep;
2562 namep = sstart + soff;
2563 } else {
2564 /* Trim off some if we can */
2565 *mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2566 dt_string_end = *mem_start;
2567 }
2568 prev_name = namep;
2569 }
2570
2571 /* do all our children */
2572 child = call_prom("child", 1, 1, node);
2573 while (child != 0) {
2574 scan_dt_build_strings(child, mem_start, mem_end);
2575 child = call_prom("peer", 1, 1, child);
2576 }
2577}
2578
2579static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2580 unsigned long *mem_end)
2581{
2582 phandle child;
2583 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2584 unsigned long soff;
2585 unsigned char *valp;
2586 static char pname[MAX_PROPERTY_NAME] __prombss;
2587 int l, room, has_phandle = 0;
2588
2589 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2590
2591 /* get the node's full name */
2592 namep = (char *)*mem_start;
2593 room = *mem_end - *mem_start;
2594 if (room > 255)
2595 room = 255;
2596 l = call_prom("package-to-path", 3, 1, node, namep, room);
2597 if (l >= 0) {
2598 /* Didn't fit? Get more room. */
2599 if (l >= room) {
2600 if (l >= *mem_end - *mem_start)
2601 namep = make_room(mem_start, mem_end, l+1, 1);
2602 call_prom("package-to-path", 3, 1, node, namep, l);
2603 }
2604 namep[l] = '\0';
2605
2606 /* Fixup an Apple bug where they have bogus \0 chars in the
2607 * middle of the path in some properties, and extract
2608 * the unit name (everything after the last '/').
2609 */
2610 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2611 if (*p == '/')
2612 lp = namep;
2613 else if (*p != 0)
2614 *lp++ = *p;
2615 }
2616 *lp = 0;
2617 *mem_start = ALIGN((unsigned long)lp + 1, 4);
2618 }
2619
2620 /* get it again for debugging */
2621 path = prom_scratch;
2622 memset(path, 0, sizeof(prom_scratch));
2623 call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
2624
2625 /* get and store all properties */
2626 prev_name = "";
2627 sstart = (char *)dt_string_start;
2628 for (;;) {
2629 if (call_prom("nextprop", 3, 1, node, prev_name,
2630 pname) != 1)
2631 break;
2632
2633 /* skip "name" */
2634 if (prom_strcmp(pname, "name") == 0) {
2635 prev_name = "name";
2636 continue;
2637 }
2638
2639 /* find string offset */
2640 soff = dt_find_string(pname);
2641 if (soff == 0) {
2642 prom_printf("WARNING: Can't find string index for"
2643 " <%s>, node %s\n", pname, path);
2644 break;
2645 }
2646 prev_name = sstart + soff;
2647
2648 /* get length */
2649 l = call_prom("getproplen", 2, 1, node, pname);
2650
2651 /* sanity checks */
2652 if (l == PROM_ERROR)
2653 continue;
2654
2655 /* push property head */
2656 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2657 dt_push_token(l, mem_start, mem_end);
2658 dt_push_token(soff, mem_start, mem_end);
2659
2660 /* push property content */
2661 valp = make_room(mem_start, mem_end, l, 4);
2662 call_prom("getprop", 4, 1, node, pname, valp, l);
2663 *mem_start = ALIGN(*mem_start, 4);
2664
2665 if (!prom_strcmp(pname, "phandle"))
2666 has_phandle = 1;
2667 }
2668
2669 /* Add a "phandle" property if none already exist */
2670 if (!has_phandle) {
2671 soff = dt_find_string("phandle");
2672 if (soff == 0)
2673 prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
2674 else {
2675 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2676 dt_push_token(4, mem_start, mem_end);
2677 dt_push_token(soff, mem_start, mem_end);
2678 valp = make_room(mem_start, mem_end, 4, 4);
2679 *(__be32 *)valp = cpu_to_be32(node);
2680 }
2681 }
2682
2683 /* do all our children */
2684 child = call_prom("child", 1, 1, node);
2685 while (child != 0) {
2686 scan_dt_build_struct(child, mem_start, mem_end);
2687 child = call_prom("peer", 1, 1, child);
2688 }
2689
2690 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2691}
2692
2693static void __init flatten_device_tree(void)
2694{
2695 phandle root;
2696 unsigned long mem_start, mem_end, room;
2697 struct boot_param_header *hdr;
2698 char *namep;
2699 u64 *rsvmap;
2700
2701 /*
2702 * Check how much room we have between alloc top & bottom (+/- a
2703 * few pages), crop to 1MB, as this is our "chunk" size
2704 */
2705 room = alloc_top - alloc_bottom - 0x4000;
2706 if (room > DEVTREE_CHUNK_SIZE)
2707 room = DEVTREE_CHUNK_SIZE;
2708 prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
2709
2710 /* Now try to claim that */
2711 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2712 if (mem_start == 0)
2713 prom_panic("Can't allocate initial device-tree chunk\n");
2714 mem_end = mem_start + room;
2715
2716 /* Get root of tree */
2717 root = call_prom("peer", 1, 1, (phandle)0);
2718 if (root == (phandle)0)
2719 prom_panic ("couldn't get device tree root\n");
2720
2721 /* Build header and make room for mem rsv map */
2722 mem_start = ALIGN(mem_start, 4);
2723 hdr = make_room(&mem_start, &mem_end,
2724 sizeof(struct boot_param_header), 4);
2725 dt_header_start = (unsigned long)hdr;
2726 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2727
2728 /* Start of strings */
2729 mem_start = PAGE_ALIGN(mem_start);
2730 dt_string_start = mem_start;
2731 mem_start += 4; /* hole */
2732
2733 /* Add "phandle" in there, we'll need it */
2734 namep = make_room(&mem_start, &mem_end, 16, 1);
2735 prom_strscpy_pad(namep, "phandle", sizeof("phandle"));
2736 mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2737
2738 /* Build string array */
2739 prom_printf("Building dt strings...\n");
2740 scan_dt_build_strings(root, &mem_start, &mem_end);
2741 dt_string_end = mem_start;
2742
2743 /* Build structure */
2744 mem_start = PAGE_ALIGN(mem_start);
2745 dt_struct_start = mem_start;
2746 prom_printf("Building dt structure...\n");
2747 scan_dt_build_struct(root, &mem_start, &mem_end);
2748 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2749 dt_struct_end = PAGE_ALIGN(mem_start);
2750
2751 /* Finish header */
2752 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2753 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2754 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2755 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2756 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2757 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2758 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2759 hdr->version = cpu_to_be32(OF_DT_VERSION);
2760 /* Version 16 is not backward compatible */
2761 hdr->last_comp_version = cpu_to_be32(0x10);
2762
2763 /* Copy the reserve map in */
2764 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2765
2766#ifdef DEBUG_PROM
2767 {
2768 int i;
2769 prom_printf("reserved memory map:\n");
2770 for (i = 0; i < mem_reserve_cnt; i++)
2771 prom_printf(" %llx - %llx\n",
2772 be64_to_cpu(mem_reserve_map[i].base),
2773 be64_to_cpu(mem_reserve_map[i].size));
2774 }
2775#endif
2776 /* Bump mem_reserve_cnt to cause further reservations to fail
2777 * since it's too late.
2778 */
2779 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2780
2781 prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
2782 dt_string_start, dt_string_end);
2783 prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
2784 dt_struct_start, dt_struct_end);
2785}
2786
2787#ifdef CONFIG_PPC_MAPLE
2788/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2789 * The values are bad, and it doesn't even have the right number of cells. */
2790static void __init fixup_device_tree_maple(void)
2791{
2792 phandle isa;
2793 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2794 u32 isa_ranges[6];
2795 char *name;
2796
2797 name = "/ht@0/isa@4";
2798 isa = call_prom("finddevice", 1, 1, ADDR(name));
2799 if (!PHANDLE_VALID(isa)) {
2800 name = "/ht@0/isa@6";
2801 isa = call_prom("finddevice", 1, 1, ADDR(name));
2802 rloc = 0x01003000; /* IO space; PCI device = 6 */
2803 }
2804 if (!PHANDLE_VALID(isa))
2805 return;
2806
2807 if (prom_getproplen(isa, "ranges") != 12)
2808 return;
2809 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2810 == PROM_ERROR)
2811 return;
2812
2813 if (isa_ranges[0] != 0x1 ||
2814 isa_ranges[1] != 0xf4000000 ||
2815 isa_ranges[2] != 0x00010000)
2816 return;
2817
2818 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2819
2820 isa_ranges[0] = 0x1;
2821 isa_ranges[1] = 0x0;
2822 isa_ranges[2] = rloc;
2823 isa_ranges[3] = 0x0;
2824 isa_ranges[4] = 0x0;
2825 isa_ranges[5] = 0x00010000;
2826 prom_setprop(isa, name, "ranges",
2827 isa_ranges, sizeof(isa_ranges));
2828}
2829
2830#define CPC925_MC_START 0xf8000000
2831#define CPC925_MC_LENGTH 0x1000000
2832/* The values for memory-controller don't have right number of cells */
2833static void __init fixup_device_tree_maple_memory_controller(void)
2834{
2835 phandle mc;
2836 u32 mc_reg[4];
2837 char *name = "/hostbridge@f8000000";
2838 u32 ac, sc;
2839
2840 mc = call_prom("finddevice", 1, 1, ADDR(name));
2841 if (!PHANDLE_VALID(mc))
2842 return;
2843
2844 if (prom_getproplen(mc, "reg") != 8)
2845 return;
2846
2847 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2848 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2849 if ((ac != 2) || (sc != 2))
2850 return;
2851
2852 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2853 return;
2854
2855 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2856 return;
2857
2858 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2859
2860 mc_reg[0] = 0x0;
2861 mc_reg[1] = CPC925_MC_START;
2862 mc_reg[2] = 0x0;
2863 mc_reg[3] = CPC925_MC_LENGTH;
2864 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2865}
2866#else
2867#define fixup_device_tree_maple()
2868#define fixup_device_tree_maple_memory_controller()
2869#endif
2870
2871#ifdef CONFIG_PPC_CHRP
2872/*
2873 * Pegasos and BriQ lacks the "ranges" property in the isa node
2874 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2875 * Pegasos has the IDE configured in legacy mode, but advertised as native
2876 */
2877static void __init fixup_device_tree_chrp(void)
2878{
2879 phandle ph;
2880 u32 prop[6];
2881 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2882 char *name;
2883 int rc;
2884
2885 name = "/pci@80000000/isa@c";
2886 ph = call_prom("finddevice", 1, 1, ADDR(name));
2887 if (!PHANDLE_VALID(ph)) {
2888 name = "/pci@ff500000/isa@6";
2889 ph = call_prom("finddevice", 1, 1, ADDR(name));
2890 rloc = 0x01003000; /* IO space; PCI device = 6 */
2891 }
2892 if (PHANDLE_VALID(ph)) {
2893 rc = prom_getproplen(ph, "ranges");
2894 if (rc == 0 || rc == PROM_ERROR) {
2895 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2896
2897 prop[0] = 0x1;
2898 prop[1] = 0x0;
2899 prop[2] = rloc;
2900 prop[3] = 0x0;
2901 prop[4] = 0x0;
2902 prop[5] = 0x00010000;
2903 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2904 }
2905 }
2906
2907 name = "/pci@80000000/ide@C,1";
2908 ph = call_prom("finddevice", 1, 1, ADDR(name));
2909 if (PHANDLE_VALID(ph)) {
2910 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2911 prop[0] = 14;
2912 prop[1] = 0x0;
2913 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2914 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2915 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2916 if (rc == sizeof(u32)) {
2917 prop[0] &= ~0x5;
2918 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2919 }
2920 }
2921}
2922#else
2923#define fixup_device_tree_chrp()
2924#endif
2925
2926#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2927static void __init fixup_device_tree_pmac(void)
2928{
2929 phandle u3, i2c, mpic;
2930 u32 u3_rev;
2931 u32 interrupts[2];
2932 u32 parent;
2933
2934 /* Some G5s have a missing interrupt definition, fix it up here */
2935 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2936 if (!PHANDLE_VALID(u3))
2937 return;
2938 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2939 if (!PHANDLE_VALID(i2c))
2940 return;
2941 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2942 if (!PHANDLE_VALID(mpic))
2943 return;
2944
2945 /* check if proper rev of u3 */
2946 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2947 == PROM_ERROR)
2948 return;
2949 if (u3_rev < 0x35 || u3_rev > 0x39)
2950 return;
2951 /* does it need fixup ? */
2952 if (prom_getproplen(i2c, "interrupts") > 0)
2953 return;
2954
2955 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2956
2957 /* interrupt on this revision of u3 is number 0 and level */
2958 interrupts[0] = 0;
2959 interrupts[1] = 1;
2960 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2961 &interrupts, sizeof(interrupts));
2962 parent = (u32)mpic;
2963 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2964 &parent, sizeof(parent));
2965}
2966#else
2967#define fixup_device_tree_pmac()
2968#endif
2969
2970#ifdef CONFIG_PPC_EFIKA
2971/*
2972 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2973 * to talk to the phy. If the phy-handle property is missing, then this
2974 * function is called to add the appropriate nodes and link it to the
2975 * ethernet node.
2976 */
2977static void __init fixup_device_tree_efika_add_phy(void)
2978{
2979 u32 node;
2980 char prop[64];
2981 int rv;
2982
2983 /* Check if /builtin/ethernet exists - bail if it doesn't */
2984 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2985 if (!PHANDLE_VALID(node))
2986 return;
2987
2988 /* Check if the phy-handle property exists - bail if it does */
2989 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2990 if (rv <= 0)
2991 return;
2992
2993 /*
2994 * At this point the ethernet device doesn't have a phy described.
2995 * Now we need to add the missing phy node and linkage
2996 */
2997
2998 /* Check for an MDIO bus node - if missing then create one */
2999 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
3000 if (!PHANDLE_VALID(node)) {
3001 prom_printf("Adding Ethernet MDIO node\n");
3002 call_prom("interpret", 1, 1,
3003 " s\" /builtin\" find-device"
3004 " new-device"
3005 " 1 encode-int s\" #address-cells\" property"
3006 " 0 encode-int s\" #size-cells\" property"
3007 " s\" mdio\" device-name"
3008 " s\" fsl,mpc5200b-mdio\" encode-string"
3009 " s\" compatible\" property"
3010 " 0xf0003000 0x400 reg"
3011 " 0x2 encode-int"
3012 " 0x5 encode-int encode+"
3013 " 0x3 encode-int encode+"
3014 " s\" interrupts\" property"
3015 " finish-device");
3016 }
3017
3018 /* Check for a PHY device node - if missing then create one and
3019 * give it's phandle to the ethernet node */
3020 node = call_prom("finddevice", 1, 1,
3021 ADDR("/builtin/mdio/ethernet-phy"));
3022 if (!PHANDLE_VALID(node)) {
3023 prom_printf("Adding Ethernet PHY node\n");
3024 call_prom("interpret", 1, 1,
3025 " s\" /builtin/mdio\" find-device"
3026 " new-device"
3027 " s\" ethernet-phy\" device-name"
3028 " 0x10 encode-int s\" reg\" property"
3029 " my-self"
3030 " ihandle>phandle"
3031 " finish-device"
3032 " s\" /builtin/ethernet\" find-device"
3033 " encode-int"
3034 " s\" phy-handle\" property"
3035 " device-end");
3036 }
3037}
3038
3039static void __init fixup_device_tree_efika(void)
3040{
3041 int sound_irq[3] = { 2, 2, 0 };
3042 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
3043 3,4,0, 3,5,0, 3,6,0, 3,7,0,
3044 3,8,0, 3,9,0, 3,10,0, 3,11,0,
3045 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
3046 u32 node;
3047 char prop[64];
3048 int rv, len;
3049
3050 /* Check if we're really running on a EFIKA */
3051 node = call_prom("finddevice", 1, 1, ADDR("/"));
3052 if (!PHANDLE_VALID(node))
3053 return;
3054
3055 rv = prom_getprop(node, "model", prop, sizeof(prop));
3056 if (rv == PROM_ERROR)
3057 return;
3058 if (prom_strcmp(prop, "EFIKA5K2"))
3059 return;
3060
3061 prom_printf("Applying EFIKA device tree fixups\n");
3062
3063 /* Claiming to be 'chrp' is death */
3064 node = call_prom("finddevice", 1, 1, ADDR("/"));
3065 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
3066 if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
3067 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
3068
3069 /* CODEGEN,description is exposed in /proc/cpuinfo so
3070 fix that too */
3071 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
3072 if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
3073 prom_setprop(node, "/", "CODEGEN,description",
3074 "Efika 5200B PowerPC System",
3075 sizeof("Efika 5200B PowerPC System"));
3076
3077 /* Fixup bestcomm interrupts property */
3078 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
3079 if (PHANDLE_VALID(node)) {
3080 len = prom_getproplen(node, "interrupts");
3081 if (len == 12) {
3082 prom_printf("Fixing bestcomm interrupts property\n");
3083 prom_setprop(node, "/builtin/bestcom", "interrupts",
3084 bcomm_irq, sizeof(bcomm_irq));
3085 }
3086 }
3087
3088 /* Fixup sound interrupts property */
3089 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
3090 if (PHANDLE_VALID(node)) {
3091 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
3092 if (rv == PROM_ERROR) {
3093 prom_printf("Adding sound interrupts property\n");
3094 prom_setprop(node, "/builtin/sound", "interrupts",
3095 sound_irq, sizeof(sound_irq));
3096 }
3097 }
3098
3099 /* Make sure ethernet phy-handle property exists */
3100 fixup_device_tree_efika_add_phy();
3101}
3102#else
3103#define fixup_device_tree_efika()
3104#endif
3105
3106#ifdef CONFIG_PPC_PASEMI_NEMO
3107/*
3108 * CFE supplied on Nemo is broken in several ways, biggest
3109 * problem is that it reassigns ISA interrupts to unused mpic ints.
3110 * Add an interrupt-controller property for the io-bridge to use
3111 * and correct the ints so we can attach them to an irq_domain
3112 */
3113static void __init fixup_device_tree_pasemi(void)
3114{
3115 u32 interrupts[2], parent, rval, val = 0;
3116 char *name, *pci_name;
3117 phandle iob, node;
3118
3119 /* Find the root pci node */
3120 name = "/pxp@0,e0000000";
3121 iob = call_prom("finddevice", 1, 1, ADDR(name));
3122 if (!PHANDLE_VALID(iob))
3123 return;
3124
3125 /* check if interrupt-controller node set yet */
3126 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
3127 return;
3128
3129 prom_printf("adding interrupt-controller property for SB600...\n");
3130
3131 prom_setprop(iob, name, "interrupt-controller", &val, 0);
3132
3133 pci_name = "/pxp@0,e0000000/pci@11";
3134 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
3135 parent = ADDR(iob);
3136
3137 for( ; prom_next_node(&node); ) {
3138 /* scan each node for one with an interrupt */
3139 if (!PHANDLE_VALID(node))
3140 continue;
3141
3142 rval = prom_getproplen(node, "interrupts");
3143 if (rval == 0 || rval == PROM_ERROR)
3144 continue;
3145
3146 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
3147 if ((interrupts[0] < 212) || (interrupts[0] > 222))
3148 continue;
3149
3150 /* found a node, update both interrupts and interrupt-parent */
3151 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
3152 interrupts[0] -= 203;
3153 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
3154 interrupts[0] -= 213;
3155 if (interrupts[0] == 221)
3156 interrupts[0] = 14;
3157 if (interrupts[0] == 222)
3158 interrupts[0] = 8;
3159
3160 prom_setprop(node, pci_name, "interrupts", interrupts,
3161 sizeof(interrupts));
3162 prom_setprop(node, pci_name, "interrupt-parent", &parent,
3163 sizeof(parent));
3164 }
3165
3166 /*
3167 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
3168 * so that generic isa-bridge code can add the SB600 and its on-board
3169 * peripherals.
3170 */
3171 name = "/pxp@0,e0000000/io-bridge@0";
3172 iob = call_prom("finddevice", 1, 1, ADDR(name));
3173 if (!PHANDLE_VALID(iob))
3174 return;
3175
3176 /* device_type is already set, just change it. */
3177
3178 prom_printf("Changing device_type of SB600 node...\n");
3179
3180 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
3181}
3182#else /* !CONFIG_PPC_PASEMI_NEMO */
3183static inline void fixup_device_tree_pasemi(void) { }
3184#endif
3185
3186static void __init fixup_device_tree(void)
3187{
3188 fixup_device_tree_maple();
3189 fixup_device_tree_maple_memory_controller();
3190 fixup_device_tree_chrp();
3191 fixup_device_tree_pmac();
3192 fixup_device_tree_efika();
3193 fixup_device_tree_pasemi();
3194}
3195
3196static void __init prom_find_boot_cpu(void)
3197{
3198 __be32 rval;
3199 ihandle prom_cpu;
3200 phandle cpu_pkg;
3201
3202 rval = 0;
3203 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
3204 return;
3205 prom_cpu = be32_to_cpu(rval);
3206
3207 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
3208
3209 if (!PHANDLE_VALID(cpu_pkg))
3210 return;
3211
3212 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
3213 prom.cpu = be32_to_cpu(rval);
3214
3215 prom_debug("Booting CPU hw index = %d\n", prom.cpu);
3216}
3217
3218static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
3219{
3220#ifdef CONFIG_BLK_DEV_INITRD
3221 if (r3 && r4 && r4 != 0xdeadbeef) {
3222 __be64 val;
3223
3224 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
3225 prom_initrd_end = prom_initrd_start + r4;
3226
3227 val = cpu_to_be64(prom_initrd_start);
3228 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
3229 &val, sizeof(val));
3230 val = cpu_to_be64(prom_initrd_end);
3231 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
3232 &val, sizeof(val));
3233
3234 reserve_mem(prom_initrd_start,
3235 prom_initrd_end - prom_initrd_start);
3236
3237 prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
3238 prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
3239 }
3240#endif /* CONFIG_BLK_DEV_INITRD */
3241}
3242
3243#ifdef CONFIG_PPC_SVM
3244/*
3245 * Perform the Enter Secure Mode ultracall.
3246 */
3247static int __init enter_secure_mode(unsigned long kbase, unsigned long fdt)
3248{
3249 register unsigned long r3 asm("r3") = UV_ESM;
3250 register unsigned long r4 asm("r4") = kbase;
3251 register unsigned long r5 asm("r5") = fdt;
3252
3253 asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
3254
3255 return r3;
3256}
3257
3258/*
3259 * Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
3260 */
3261static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3262{
3263 int ret;
3264
3265 if (!prom_svm_enable)
3266 return;
3267
3268 /* Switch to secure mode. */
3269 prom_printf("Switching to secure mode.\n");
3270
3271 /*
3272 * The ultravisor will do an integrity check of the kernel image but we
3273 * relocated it so the check will fail. Restore the original image by
3274 * relocating it back to the kernel virtual base address.
3275 */
3276 relocate(KERNELBASE);
3277
3278 ret = enter_secure_mode(kbase, fdt);
3279
3280 /* Relocate the kernel again. */
3281 relocate(kbase);
3282
3283 if (ret != U_SUCCESS) {
3284 prom_printf("Returned %d from switching to secure mode.\n", ret);
3285 prom_rtas_os_term("Switch to secure mode failed.\n");
3286 }
3287}
3288#else
3289static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3290{
3291}
3292#endif /* CONFIG_PPC_SVM */
3293
3294/*
3295 * We enter here early on, when the Open Firmware prom is still
3296 * handling exceptions and the MMU hash table for us.
3297 */
3298
3299unsigned long __init prom_init(unsigned long r3, unsigned long r4,
3300 unsigned long pp,
3301 unsigned long r6, unsigned long r7,
3302 unsigned long kbase)
3303{
3304 unsigned long hdr;
3305
3306#ifdef CONFIG_PPC32
3307 unsigned long offset = reloc_offset();
3308 reloc_got2(offset);
3309#endif
3310
3311 /*
3312 * First zero the BSS
3313 */
3314 memset(&__bss_start, 0, __bss_stop - __bss_start);
3315
3316 /*
3317 * Init interface to Open Firmware, get some node references,
3318 * like /chosen
3319 */
3320 prom_init_client_services(pp);
3321
3322 /*
3323 * See if this OF is old enough that we need to do explicit maps
3324 * and other workarounds
3325 */
3326 prom_find_mmu();
3327
3328 /*
3329 * Init prom stdout device
3330 */
3331 prom_init_stdout();
3332
3333 prom_printf("Preparing to boot %s", linux_banner);
3334
3335 /*
3336 * Get default machine type. At this point, we do not differentiate
3337 * between pSeries SMP and pSeries LPAR
3338 */
3339 of_platform = prom_find_machine_type();
3340 prom_printf("Detected machine type: %x\n", of_platform);
3341
3342#ifndef CONFIG_NONSTATIC_KERNEL
3343 /* Bail if this is a kdump kernel. */
3344 if (PHYSICAL_START > 0)
3345 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
3346#endif
3347
3348 /*
3349 * Check for an initrd
3350 */
3351 prom_check_initrd(r3, r4);
3352
3353 /*
3354 * Do early parsing of command line
3355 */
3356 early_cmdline_parse();
3357
3358#ifdef CONFIG_PPC_PSERIES
3359 /*
3360 * On pSeries, inform the firmware about our capabilities
3361 */
3362 if (of_platform == PLATFORM_PSERIES ||
3363 of_platform == PLATFORM_PSERIES_LPAR)
3364 prom_send_capabilities();
3365#endif
3366
3367 /*
3368 * Copy the CPU hold code
3369 */
3370 if (of_platform != PLATFORM_POWERMAC)
3371 copy_and_flush(0, kbase, 0x100, 0);
3372
3373 /*
3374 * Initialize memory management within prom_init
3375 */
3376 prom_init_mem();
3377
3378 /*
3379 * Determine which cpu is actually running right _now_
3380 */
3381 prom_find_boot_cpu();
3382
3383 /*
3384 * Initialize display devices
3385 */
3386 prom_check_displays();
3387
3388#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3389 /*
3390 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3391 * that uses the allocator, we need to make sure we get the top of memory
3392 * available for us here...
3393 */
3394 if (of_platform == PLATFORM_PSERIES)
3395 prom_initialize_tce_table();
3396#endif
3397
3398 /*
3399 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3400 * have a usable RTAS implementation.
3401 */
3402 if (of_platform != PLATFORM_POWERMAC)
3403 prom_instantiate_rtas();
3404
3405#ifdef CONFIG_PPC64
3406 /* instantiate sml */
3407 prom_instantiate_sml();
3408#endif
3409
3410 /*
3411 * On non-powermacs, put all CPUs in spin-loops.
3412 *
3413 * PowerMacs use a different mechanism to spin CPUs
3414 *
3415 * (This must be done after instantiating RTAS)
3416 */
3417 if (of_platform != PLATFORM_POWERMAC)
3418 prom_hold_cpus();
3419
3420 /*
3421 * Fill in some infos for use by the kernel later on
3422 */
3423 if (prom_memory_limit) {
3424 __be64 val = cpu_to_be64(prom_memory_limit);
3425 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3426 &val, sizeof(val));
3427 }
3428#ifdef CONFIG_PPC64
3429 if (prom_iommu_off)
3430 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3431 NULL, 0);
3432
3433 if (prom_iommu_force_on)
3434 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3435 NULL, 0);
3436
3437 if (prom_tce_alloc_start) {
3438 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3439 &prom_tce_alloc_start,
3440 sizeof(prom_tce_alloc_start));
3441 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3442 &prom_tce_alloc_end,
3443 sizeof(prom_tce_alloc_end));
3444 }
3445#endif
3446
3447 /*
3448 * Fixup any known bugs in the device-tree
3449 */
3450 fixup_device_tree();
3451
3452 /*
3453 * Now finally create the flattened device-tree
3454 */
3455 prom_printf("copying OF device tree...\n");
3456 flatten_device_tree();
3457
3458 /*
3459 * in case stdin is USB and still active on IBM machines...
3460 * Unfortunately quiesce crashes on some powermacs if we have
3461 * closed stdin already (in particular the powerbook 101).
3462 */
3463 if (of_platform != PLATFORM_POWERMAC)
3464 prom_close_stdin();
3465
3466 /*
3467 * Call OF "quiesce" method to shut down pending DMA's from
3468 * devices etc...
3469 */
3470 prom_printf("Quiescing Open Firmware ...\n");
3471 call_prom("quiesce", 0, 0);
3472
3473 /*
3474 * And finally, call the kernel passing it the flattened device
3475 * tree and NULL as r5, thus triggering the new entry point which
3476 * is common to us and kexec
3477 */
3478 hdr = dt_header_start;
3479
3480 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3481 prom_debug("->dt_header_start=0x%lx\n", hdr);
3482
3483#ifdef CONFIG_PPC32
3484 reloc_got2(-offset);
3485#endif
3486
3487 /* Move to secure memory if we're supposed to be secure guests. */
3488 setup_secure_guest(kbase, hdr);
3489
3490 __start(hdr, kbase, 0, 0, 0, 0, 0);
3491
3492 return 0;
3493}
1/*
2 * Procedures for interfacing to Open Firmware.
3 *
4 * Paul Mackerras August 1996.
5 * Copyright (C) 1996-2005 Paul Mackerras.
6 *
7 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
8 * {engebret|bergner}@us.ibm.com
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16#undef DEBUG_PROM
17
18#include <stdarg.h>
19#include <linux/kernel.h>
20#include <linux/string.h>
21#include <linux/init.h>
22#include <linux/threads.h>
23#include <linux/spinlock.h>
24#include <linux/types.h>
25#include <linux/pci.h>
26#include <linux/proc_fs.h>
27#include <linux/stringify.h>
28#include <linux/delay.h>
29#include <linux/initrd.h>
30#include <linux/bitops.h>
31#include <asm/prom.h>
32#include <asm/rtas.h>
33#include <asm/page.h>
34#include <asm/processor.h>
35#include <asm/irq.h>
36#include <asm/io.h>
37#include <asm/smp.h>
38#include <asm/mmu.h>
39#include <asm/pgtable.h>
40#include <asm/iommu.h>
41#include <asm/btext.h>
42#include <asm/sections.h>
43#include <asm/machdep.h>
44#include <asm/opal.h>
45#include <asm/asm-prototypes.h>
46
47#include <linux/linux_logo.h>
48
49/*
50 * Eventually bump that one up
51 */
52#define DEVTREE_CHUNK_SIZE 0x100000
53
54/*
55 * This is the size of the local memory reserve map that gets copied
56 * into the boot params passed to the kernel. That size is totally
57 * flexible as the kernel just reads the list until it encounters an
58 * entry with size 0, so it can be changed without breaking binary
59 * compatibility
60 */
61#define MEM_RESERVE_MAP_SIZE 8
62
63/*
64 * prom_init() is called very early on, before the kernel text
65 * and data have been mapped to KERNELBASE. At this point the code
66 * is running at whatever address it has been loaded at.
67 * On ppc32 we compile with -mrelocatable, which means that references
68 * to extern and static variables get relocated automatically.
69 * ppc64 objects are always relocatable, we just need to relocate the
70 * TOC.
71 *
72 * Because OF may have mapped I/O devices into the area starting at
73 * KERNELBASE, particularly on CHRP machines, we can't safely call
74 * OF once the kernel has been mapped to KERNELBASE. Therefore all
75 * OF calls must be done within prom_init().
76 *
77 * ADDR is used in calls to call_prom. The 4th and following
78 * arguments to call_prom should be 32-bit values.
79 * On ppc64, 64 bit values are truncated to 32 bits (and
80 * fortunately don't get interpreted as two arguments).
81 */
82#define ADDR(x) (u32)(unsigned long)(x)
83
84#ifdef CONFIG_PPC64
85#define OF_WORKAROUNDS 0
86#else
87#define OF_WORKAROUNDS of_workarounds
88int of_workarounds;
89#endif
90
91#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
92#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
93
94#define PROM_BUG() do { \
95 prom_printf("kernel BUG at %s line 0x%x!\n", \
96 __FILE__, __LINE__); \
97 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
98} while (0)
99
100#ifdef DEBUG_PROM
101#define prom_debug(x...) prom_printf(x)
102#else
103#define prom_debug(x...)
104#endif
105
106
107typedef u32 prom_arg_t;
108
109struct prom_args {
110 __be32 service;
111 __be32 nargs;
112 __be32 nret;
113 __be32 args[10];
114};
115
116struct prom_t {
117 ihandle root;
118 phandle chosen;
119 int cpu;
120 ihandle stdout;
121 ihandle mmumap;
122 ihandle memory;
123};
124
125struct mem_map_entry {
126 __be64 base;
127 __be64 size;
128};
129
130typedef __be32 cell_t;
131
132extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
133 unsigned long r6, unsigned long r7, unsigned long r8,
134 unsigned long r9);
135
136#ifdef CONFIG_PPC64
137extern int enter_prom(struct prom_args *args, unsigned long entry);
138#else
139static inline int enter_prom(struct prom_args *args, unsigned long entry)
140{
141 return ((int (*)(struct prom_args *))entry)(args);
142}
143#endif
144
145extern void copy_and_flush(unsigned long dest, unsigned long src,
146 unsigned long size, unsigned long offset);
147
148/* prom structure */
149static struct prom_t __initdata prom;
150
151static unsigned long prom_entry __initdata;
152
153#define PROM_SCRATCH_SIZE 256
154
155static char __initdata of_stdout_device[256];
156static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
157
158static unsigned long __initdata dt_header_start;
159static unsigned long __initdata dt_struct_start, dt_struct_end;
160static unsigned long __initdata dt_string_start, dt_string_end;
161
162static unsigned long __initdata prom_initrd_start, prom_initrd_end;
163
164#ifdef CONFIG_PPC64
165static int __initdata prom_iommu_force_on;
166static int __initdata prom_iommu_off;
167static unsigned long __initdata prom_tce_alloc_start;
168static unsigned long __initdata prom_tce_alloc_end;
169#endif
170
171/* Platforms codes are now obsolete in the kernel. Now only used within this
172 * file and ultimately gone too. Feel free to change them if you need, they
173 * are not shared with anything outside of this file anymore
174 */
175#define PLATFORM_PSERIES 0x0100
176#define PLATFORM_PSERIES_LPAR 0x0101
177#define PLATFORM_LPAR 0x0001
178#define PLATFORM_POWERMAC 0x0400
179#define PLATFORM_GENERIC 0x0500
180#define PLATFORM_OPAL 0x0600
181
182static int __initdata of_platform;
183
184static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
185
186static unsigned long __initdata prom_memory_limit;
187
188static unsigned long __initdata alloc_top;
189static unsigned long __initdata alloc_top_high;
190static unsigned long __initdata alloc_bottom;
191static unsigned long __initdata rmo_top;
192static unsigned long __initdata ram_top;
193
194static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
195static int __initdata mem_reserve_cnt;
196
197static cell_t __initdata regbuf[1024];
198
199static bool rtas_has_query_cpu_stopped;
200
201
202/*
203 * Error results ... some OF calls will return "-1" on error, some
204 * will return 0, some will return either. To simplify, here are
205 * macros to use with any ihandle or phandle return value to check if
206 * it is valid
207 */
208
209#define PROM_ERROR (-1u)
210#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
211#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
212
213
214/* This is the one and *ONLY* place where we actually call open
215 * firmware.
216 */
217
218static int __init call_prom(const char *service, int nargs, int nret, ...)
219{
220 int i;
221 struct prom_args args;
222 va_list list;
223
224 args.service = cpu_to_be32(ADDR(service));
225 args.nargs = cpu_to_be32(nargs);
226 args.nret = cpu_to_be32(nret);
227
228 va_start(list, nret);
229 for (i = 0; i < nargs; i++)
230 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
231 va_end(list);
232
233 for (i = 0; i < nret; i++)
234 args.args[nargs+i] = 0;
235
236 if (enter_prom(&args, prom_entry) < 0)
237 return PROM_ERROR;
238
239 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
240}
241
242static int __init call_prom_ret(const char *service, int nargs, int nret,
243 prom_arg_t *rets, ...)
244{
245 int i;
246 struct prom_args args;
247 va_list list;
248
249 args.service = cpu_to_be32(ADDR(service));
250 args.nargs = cpu_to_be32(nargs);
251 args.nret = cpu_to_be32(nret);
252
253 va_start(list, rets);
254 for (i = 0; i < nargs; i++)
255 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
256 va_end(list);
257
258 for (i = 0; i < nret; i++)
259 args.args[nargs+i] = 0;
260
261 if (enter_prom(&args, prom_entry) < 0)
262 return PROM_ERROR;
263
264 if (rets != NULL)
265 for (i = 1; i < nret; ++i)
266 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
267
268 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
269}
270
271
272static void __init prom_print(const char *msg)
273{
274 const char *p, *q;
275
276 if (prom.stdout == 0)
277 return;
278
279 for (p = msg; *p != 0; p = q) {
280 for (q = p; *q != 0 && *q != '\n'; ++q)
281 ;
282 if (q > p)
283 call_prom("write", 3, 1, prom.stdout, p, q - p);
284 if (*q == 0)
285 break;
286 ++q;
287 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
288 }
289}
290
291
292static void __init prom_print_hex(unsigned long val)
293{
294 int i, nibbles = sizeof(val)*2;
295 char buf[sizeof(val)*2+1];
296
297 for (i = nibbles-1; i >= 0; i--) {
298 buf[i] = (val & 0xf) + '0';
299 if (buf[i] > '9')
300 buf[i] += ('a'-'0'-10);
301 val >>= 4;
302 }
303 buf[nibbles] = '\0';
304 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
305}
306
307/* max number of decimal digits in an unsigned long */
308#define UL_DIGITS 21
309static void __init prom_print_dec(unsigned long val)
310{
311 int i, size;
312 char buf[UL_DIGITS+1];
313
314 for (i = UL_DIGITS-1; i >= 0; i--) {
315 buf[i] = (val % 10) + '0';
316 val = val/10;
317 if (val == 0)
318 break;
319 }
320 /* shift stuff down */
321 size = UL_DIGITS - i;
322 call_prom("write", 3, 1, prom.stdout, buf+i, size);
323}
324
325static void __init prom_printf(const char *format, ...)
326{
327 const char *p, *q, *s;
328 va_list args;
329 unsigned long v;
330 long vs;
331
332 va_start(args, format);
333 for (p = format; *p != 0; p = q) {
334 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
335 ;
336 if (q > p)
337 call_prom("write", 3, 1, prom.stdout, p, q - p);
338 if (*q == 0)
339 break;
340 if (*q == '\n') {
341 ++q;
342 call_prom("write", 3, 1, prom.stdout,
343 ADDR("\r\n"), 2);
344 continue;
345 }
346 ++q;
347 if (*q == 0)
348 break;
349 switch (*q) {
350 case 's':
351 ++q;
352 s = va_arg(args, const char *);
353 prom_print(s);
354 break;
355 case 'x':
356 ++q;
357 v = va_arg(args, unsigned long);
358 prom_print_hex(v);
359 break;
360 case 'd':
361 ++q;
362 vs = va_arg(args, int);
363 if (vs < 0) {
364 prom_print("-");
365 vs = -vs;
366 }
367 prom_print_dec(vs);
368 break;
369 case 'l':
370 ++q;
371 if (*q == 0)
372 break;
373 else if (*q == 'x') {
374 ++q;
375 v = va_arg(args, unsigned long);
376 prom_print_hex(v);
377 } else if (*q == 'u') { /* '%lu' */
378 ++q;
379 v = va_arg(args, unsigned long);
380 prom_print_dec(v);
381 } else if (*q == 'd') { /* %ld */
382 ++q;
383 vs = va_arg(args, long);
384 if (vs < 0) {
385 prom_print("-");
386 vs = -vs;
387 }
388 prom_print_dec(vs);
389 }
390 break;
391 }
392 }
393 va_end(args);
394}
395
396
397static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
398 unsigned long align)
399{
400
401 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
402 /*
403 * Old OF requires we claim physical and virtual separately
404 * and then map explicitly (assuming virtual mode)
405 */
406 int ret;
407 prom_arg_t result;
408
409 ret = call_prom_ret("call-method", 5, 2, &result,
410 ADDR("claim"), prom.memory,
411 align, size, virt);
412 if (ret != 0 || result == -1)
413 return -1;
414 ret = call_prom_ret("call-method", 5, 2, &result,
415 ADDR("claim"), prom.mmumap,
416 align, size, virt);
417 if (ret != 0) {
418 call_prom("call-method", 4, 1, ADDR("release"),
419 prom.memory, size, virt);
420 return -1;
421 }
422 /* the 0x12 is M (coherence) + PP == read/write */
423 call_prom("call-method", 6, 1,
424 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
425 return virt;
426 }
427 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
428 (prom_arg_t)align);
429}
430
431static void __init __attribute__((noreturn)) prom_panic(const char *reason)
432{
433 prom_print(reason);
434 /* Do not call exit because it clears the screen on pmac
435 * it also causes some sort of double-fault on early pmacs */
436 if (of_platform == PLATFORM_POWERMAC)
437 asm("trap\n");
438
439 /* ToDo: should put up an SRC here on pSeries */
440 call_prom("exit", 0, 0);
441
442 for (;;) /* should never get here */
443 ;
444}
445
446
447static int __init prom_next_node(phandle *nodep)
448{
449 phandle node;
450
451 if ((node = *nodep) != 0
452 && (*nodep = call_prom("child", 1, 1, node)) != 0)
453 return 1;
454 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
455 return 1;
456 for (;;) {
457 if ((node = call_prom("parent", 1, 1, node)) == 0)
458 return 0;
459 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
460 return 1;
461 }
462}
463
464static inline int prom_getprop(phandle node, const char *pname,
465 void *value, size_t valuelen)
466{
467 return call_prom("getprop", 4, 1, node, ADDR(pname),
468 (u32)(unsigned long) value, (u32) valuelen);
469}
470
471static inline int prom_getproplen(phandle node, const char *pname)
472{
473 return call_prom("getproplen", 2, 1, node, ADDR(pname));
474}
475
476static void add_string(char **str, const char *q)
477{
478 char *p = *str;
479
480 while (*q)
481 *p++ = *q++;
482 *p++ = ' ';
483 *str = p;
484}
485
486static char *tohex(unsigned int x)
487{
488 static char digits[] = "0123456789abcdef";
489 static char result[9];
490 int i;
491
492 result[8] = 0;
493 i = 8;
494 do {
495 --i;
496 result[i] = digits[x & 0xf];
497 x >>= 4;
498 } while (x != 0 && i > 0);
499 return &result[i];
500}
501
502static int __init prom_setprop(phandle node, const char *nodename,
503 const char *pname, void *value, size_t valuelen)
504{
505 char cmd[256], *p;
506
507 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
508 return call_prom("setprop", 4, 1, node, ADDR(pname),
509 (u32)(unsigned long) value, (u32) valuelen);
510
511 /* gah... setprop doesn't work on longtrail, have to use interpret */
512 p = cmd;
513 add_string(&p, "dev");
514 add_string(&p, nodename);
515 add_string(&p, tohex((u32)(unsigned long) value));
516 add_string(&p, tohex(valuelen));
517 add_string(&p, tohex(ADDR(pname)));
518 add_string(&p, tohex(strlen(pname)));
519 add_string(&p, "property");
520 *p = 0;
521 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
522}
523
524/* We can't use the standard versions because of relocation headaches. */
525#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
526 || ('a' <= (c) && (c) <= 'f') \
527 || ('A' <= (c) && (c) <= 'F'))
528
529#define isdigit(c) ('0' <= (c) && (c) <= '9')
530#define islower(c) ('a' <= (c) && (c) <= 'z')
531#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
532
533static unsigned long prom_strtoul(const char *cp, const char **endp)
534{
535 unsigned long result = 0, base = 10, value;
536
537 if (*cp == '0') {
538 base = 8;
539 cp++;
540 if (toupper(*cp) == 'X') {
541 cp++;
542 base = 16;
543 }
544 }
545
546 while (isxdigit(*cp) &&
547 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
548 result = result * base + value;
549 cp++;
550 }
551
552 if (endp)
553 *endp = cp;
554
555 return result;
556}
557
558static unsigned long prom_memparse(const char *ptr, const char **retptr)
559{
560 unsigned long ret = prom_strtoul(ptr, retptr);
561 int shift = 0;
562
563 /*
564 * We can't use a switch here because GCC *may* generate a
565 * jump table which won't work, because we're not running at
566 * the address we're linked at.
567 */
568 if ('G' == **retptr || 'g' == **retptr)
569 shift = 30;
570
571 if ('M' == **retptr || 'm' == **retptr)
572 shift = 20;
573
574 if ('K' == **retptr || 'k' == **retptr)
575 shift = 10;
576
577 if (shift) {
578 ret <<= shift;
579 (*retptr)++;
580 }
581
582 return ret;
583}
584
585/*
586 * Early parsing of the command line passed to the kernel, used for
587 * "mem=x" and the options that affect the iommu
588 */
589static void __init early_cmdline_parse(void)
590{
591 const char *opt;
592
593 char *p;
594 int l = 0;
595
596 prom_cmd_line[0] = 0;
597 p = prom_cmd_line;
598 if ((long)prom.chosen > 0)
599 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
600#ifdef CONFIG_CMDLINE
601 if (l <= 0 || p[0] == '\0') /* dbl check */
602 strlcpy(prom_cmd_line,
603 CONFIG_CMDLINE, sizeof(prom_cmd_line));
604#endif /* CONFIG_CMDLINE */
605 prom_printf("command line: %s\n", prom_cmd_line);
606
607#ifdef CONFIG_PPC64
608 opt = strstr(prom_cmd_line, "iommu=");
609 if (opt) {
610 prom_printf("iommu opt is: %s\n", opt);
611 opt += 6;
612 while (*opt && *opt == ' ')
613 opt++;
614 if (!strncmp(opt, "off", 3))
615 prom_iommu_off = 1;
616 else if (!strncmp(opt, "force", 5))
617 prom_iommu_force_on = 1;
618 }
619#endif
620 opt = strstr(prom_cmd_line, "mem=");
621 if (opt) {
622 opt += 4;
623 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
624#ifdef CONFIG_PPC64
625 /* Align to 16 MB == size of ppc64 large page */
626 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
627#endif
628 }
629}
630
631#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
632/*
633 * The architecture vector has an array of PVR mask/value pairs,
634 * followed by # option vectors - 1, followed by the option vectors.
635 *
636 * See prom.h for the definition of the bits specified in the
637 * architecture vector.
638 */
639
640/* Firmware expects the value to be n - 1, where n is the # of vectors */
641#define NUM_VECTORS(n) ((n) - 1)
642
643/*
644 * Firmware expects 1 + n - 2, where n is the length of the option vector in
645 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
646 */
647#define VECTOR_LENGTH(n) (1 + (n) - 2)
648
649struct option_vector1 {
650 u8 byte1;
651 u8 arch_versions;
652} __packed;
653
654struct option_vector2 {
655 u8 byte1;
656 __be16 reserved;
657 __be32 real_base;
658 __be32 real_size;
659 __be32 virt_base;
660 __be32 virt_size;
661 __be32 load_base;
662 __be32 min_rma;
663 __be32 min_load;
664 u8 min_rma_percent;
665 u8 max_pft_size;
666} __packed;
667
668struct option_vector3 {
669 u8 byte1;
670 u8 byte2;
671} __packed;
672
673struct option_vector4 {
674 u8 byte1;
675 u8 min_vp_cap;
676} __packed;
677
678struct option_vector5 {
679 u8 byte1;
680 u8 byte2;
681 u8 byte3;
682 u8 cmo;
683 u8 associativity;
684 u8 bin_opts;
685 u8 micro_checkpoint;
686 u8 reserved0;
687 __be32 max_cpus;
688 __be16 papr_level;
689 __be16 reserved1;
690 u8 platform_facilities;
691 u8 reserved2;
692 __be16 reserved3;
693 u8 subprocessors;
694} __packed;
695
696struct option_vector6 {
697 u8 reserved;
698 u8 secondary_pteg;
699 u8 os_name;
700} __packed;
701
702struct ibm_arch_vec {
703 struct { u32 mask, val; } pvrs[10];
704
705 u8 num_vectors;
706
707 u8 vec1_len;
708 struct option_vector1 vec1;
709
710 u8 vec2_len;
711 struct option_vector2 vec2;
712
713 u8 vec3_len;
714 struct option_vector3 vec3;
715
716 u8 vec4_len;
717 struct option_vector4 vec4;
718
719 u8 vec5_len;
720 struct option_vector5 vec5;
721
722 u8 vec6_len;
723 struct option_vector6 vec6;
724} __packed;
725
726struct ibm_arch_vec __cacheline_aligned ibm_architecture_vec = {
727 .pvrs = {
728 {
729 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
730 .val = cpu_to_be32(0x003a0000),
731 },
732 {
733 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
734 .val = cpu_to_be32(0x003e0000),
735 },
736 {
737 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
738 .val = cpu_to_be32(0x003f0000),
739 },
740 {
741 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
742 .val = cpu_to_be32(0x004b0000),
743 },
744 {
745 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
746 .val = cpu_to_be32(0x004c0000),
747 },
748 {
749 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
750 .val = cpu_to_be32(0x004d0000),
751 },
752 {
753 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
754 .val = cpu_to_be32(0x0f000004),
755 },
756 {
757 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
758 .val = cpu_to_be32(0x0f000003),
759 },
760 {
761 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
762 .val = cpu_to_be32(0x0f000002),
763 },
764 {
765 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
766 .val = cpu_to_be32(0x0f000001),
767 },
768 },
769
770 .num_vectors = NUM_VECTORS(6),
771
772 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
773 .vec1 = {
774 .byte1 = 0,
775 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
776 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
777 },
778
779 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
780 /* option vector 2: Open Firmware options supported */
781 .vec2 = {
782 .byte1 = OV2_REAL_MODE,
783 .reserved = 0,
784 .real_base = cpu_to_be32(0xffffffff),
785 .real_size = cpu_to_be32(0xffffffff),
786 .virt_base = cpu_to_be32(0xffffffff),
787 .virt_size = cpu_to_be32(0xffffffff),
788 .load_base = cpu_to_be32(0xffffffff),
789 .min_rma = cpu_to_be32(256), /* 256MB min RMA */
790 .min_load = cpu_to_be32(0xffffffff), /* full client load */
791 .min_rma_percent = 0, /* min RMA percentage of total RAM */
792 .max_pft_size = 48, /* max log_2(hash table size) */
793 },
794
795 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
796 /* option vector 3: processor options supported */
797 .vec3 = {
798 .byte1 = 0, /* don't ignore, don't halt */
799 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
800 },
801
802 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
803 /* option vector 4: IBM PAPR implementation */
804 .vec4 = {
805 .byte1 = 0, /* don't halt */
806 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
807 },
808
809 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
810 /* option vector 5: PAPR/OF options */
811 .vec5 = {
812 .byte1 = 0, /* don't ignore, don't halt */
813 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
814 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
815#ifdef CONFIG_PCI_MSI
816 /* PCIe/MSI support. Without MSI full PCIe is not supported */
817 OV5_FEAT(OV5_MSI),
818#else
819 0,
820#endif
821 .byte3 = 0,
822 .cmo =
823#ifdef CONFIG_PPC_SMLPAR
824 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
825#else
826 0,
827#endif
828 .associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
829 .bin_opts = 0,
830 .micro_checkpoint = 0,
831 .reserved0 = 0,
832 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
833 .papr_level = 0,
834 .reserved1 = 0,
835 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
836 .reserved2 = 0,
837 .reserved3 = 0,
838 .subprocessors = 1,
839 },
840
841 /* option vector 6: IBM PAPR hints */
842 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
843 .vec6 = {
844 .reserved = 0,
845 .secondary_pteg = 0,
846 .os_name = OV6_LINUX,
847 },
848};
849
850/* Old method - ELF header with PT_NOTE sections only works on BE */
851#ifdef __BIG_ENDIAN__
852static struct fake_elf {
853 Elf32_Ehdr elfhdr;
854 Elf32_Phdr phdr[2];
855 struct chrpnote {
856 u32 namesz;
857 u32 descsz;
858 u32 type;
859 char name[8]; /* "PowerPC" */
860 struct chrpdesc {
861 u32 real_mode;
862 u32 real_base;
863 u32 real_size;
864 u32 virt_base;
865 u32 virt_size;
866 u32 load_base;
867 } chrpdesc;
868 } chrpnote;
869 struct rpanote {
870 u32 namesz;
871 u32 descsz;
872 u32 type;
873 char name[24]; /* "IBM,RPA-Client-Config" */
874 struct rpadesc {
875 u32 lpar_affinity;
876 u32 min_rmo_size;
877 u32 min_rmo_percent;
878 u32 max_pft_size;
879 u32 splpar;
880 u32 min_load;
881 u32 new_mem_def;
882 u32 ignore_me;
883 } rpadesc;
884 } rpanote;
885} fake_elf = {
886 .elfhdr = {
887 .e_ident = { 0x7f, 'E', 'L', 'F',
888 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
889 .e_type = ET_EXEC, /* yeah right */
890 .e_machine = EM_PPC,
891 .e_version = EV_CURRENT,
892 .e_phoff = offsetof(struct fake_elf, phdr),
893 .e_phentsize = sizeof(Elf32_Phdr),
894 .e_phnum = 2
895 },
896 .phdr = {
897 [0] = {
898 .p_type = PT_NOTE,
899 .p_offset = offsetof(struct fake_elf, chrpnote),
900 .p_filesz = sizeof(struct chrpnote)
901 }, [1] = {
902 .p_type = PT_NOTE,
903 .p_offset = offsetof(struct fake_elf, rpanote),
904 .p_filesz = sizeof(struct rpanote)
905 }
906 },
907 .chrpnote = {
908 .namesz = sizeof("PowerPC"),
909 .descsz = sizeof(struct chrpdesc),
910 .type = 0x1275,
911 .name = "PowerPC",
912 .chrpdesc = {
913 .real_mode = ~0U, /* ~0 means "don't care" */
914 .real_base = ~0U,
915 .real_size = ~0U,
916 .virt_base = ~0U,
917 .virt_size = ~0U,
918 .load_base = ~0U
919 },
920 },
921 .rpanote = {
922 .namesz = sizeof("IBM,RPA-Client-Config"),
923 .descsz = sizeof(struct rpadesc),
924 .type = 0x12759999,
925 .name = "IBM,RPA-Client-Config",
926 .rpadesc = {
927 .lpar_affinity = 0,
928 .min_rmo_size = 64, /* in megabytes */
929 .min_rmo_percent = 0,
930 .max_pft_size = 48, /* 2^48 bytes max PFT size */
931 .splpar = 1,
932 .min_load = ~0U,
933 .new_mem_def = 0
934 }
935 }
936};
937#endif /* __BIG_ENDIAN__ */
938
939static int __init prom_count_smt_threads(void)
940{
941 phandle node;
942 char type[64];
943 unsigned int plen;
944
945 /* Pick up th first CPU node we can find */
946 for (node = 0; prom_next_node(&node); ) {
947 type[0] = 0;
948 prom_getprop(node, "device_type", type, sizeof(type));
949
950 if (strcmp(type, "cpu"))
951 continue;
952 /*
953 * There is an entry for each smt thread, each entry being
954 * 4 bytes long. All cpus should have the same number of
955 * smt threads, so return after finding the first.
956 */
957 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
958 if (plen == PROM_ERROR)
959 break;
960 plen >>= 2;
961 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
962
963 /* Sanity check */
964 if (plen < 1 || plen > 64) {
965 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
966 (unsigned long)plen);
967 return 1;
968 }
969 return plen;
970 }
971 prom_debug("No threads found, assuming 1 per core\n");
972
973 return 1;
974
975}
976
977
978static void __init prom_send_capabilities(void)
979{
980 ihandle root;
981 prom_arg_t ret;
982 u32 cores;
983
984 root = call_prom("open", 1, 1, ADDR("/"));
985 if (root != 0) {
986 /* We need to tell the FW about the number of cores we support.
987 *
988 * To do that, we count the number of threads on the first core
989 * (we assume this is the same for all cores) and use it to
990 * divide NR_CPUS.
991 */
992
993 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
994 prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
995 cores, NR_CPUS);
996
997 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
998
999 /* try calling the ibm,client-architecture-support method */
1000 prom_printf("Calling ibm,client-architecture-support...");
1001 if (call_prom_ret("call-method", 3, 2, &ret,
1002 ADDR("ibm,client-architecture-support"),
1003 root,
1004 ADDR(&ibm_architecture_vec)) == 0) {
1005 /* the call exists... */
1006 if (ret)
1007 prom_printf("\nWARNING: ibm,client-architecture"
1008 "-support call FAILED!\n");
1009 call_prom("close", 1, 0, root);
1010 prom_printf(" done\n");
1011 return;
1012 }
1013 call_prom("close", 1, 0, root);
1014 prom_printf(" not implemented\n");
1015 }
1016
1017#ifdef __BIG_ENDIAN__
1018 {
1019 ihandle elfloader;
1020
1021 /* no ibm,client-architecture-support call, try the old way */
1022 elfloader = call_prom("open", 1, 1,
1023 ADDR("/packages/elf-loader"));
1024 if (elfloader == 0) {
1025 prom_printf("couldn't open /packages/elf-loader\n");
1026 return;
1027 }
1028 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1029 elfloader, ADDR(&fake_elf));
1030 call_prom("close", 1, 0, elfloader);
1031 }
1032#endif /* __BIG_ENDIAN__ */
1033}
1034#endif /* #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
1035
1036/*
1037 * Memory allocation strategy... our layout is normally:
1038 *
1039 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1040 * rare cases, initrd might end up being before the kernel though.
1041 * We assume this won't override the final kernel at 0, we have no
1042 * provision to handle that in this version, but it should hopefully
1043 * never happen.
1044 *
1045 * alloc_top is set to the top of RMO, eventually shrink down if the
1046 * TCEs overlap
1047 *
1048 * alloc_bottom is set to the top of kernel/initrd
1049 *
1050 * from there, allocations are done this way : rtas is allocated
1051 * topmost, and the device-tree is allocated from the bottom. We try
1052 * to grow the device-tree allocation as we progress. If we can't,
1053 * then we fail, we don't currently have a facility to restart
1054 * elsewhere, but that shouldn't be necessary.
1055 *
1056 * Note that calls to reserve_mem have to be done explicitly, memory
1057 * allocated with either alloc_up or alloc_down isn't automatically
1058 * reserved.
1059 */
1060
1061
1062/*
1063 * Allocates memory in the RMO upward from the kernel/initrd
1064 *
1065 * When align is 0, this is a special case, it means to allocate in place
1066 * at the current location of alloc_bottom or fail (that is basically
1067 * extending the previous allocation). Used for the device-tree flattening
1068 */
1069static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1070{
1071 unsigned long base = alloc_bottom;
1072 unsigned long addr = 0;
1073
1074 if (align)
1075 base = _ALIGN_UP(base, align);
1076 prom_debug("alloc_up(%x, %x)\n", size, align);
1077 if (ram_top == 0)
1078 prom_panic("alloc_up() called with mem not initialized\n");
1079
1080 if (align)
1081 base = _ALIGN_UP(alloc_bottom, align);
1082 else
1083 base = alloc_bottom;
1084
1085 for(; (base + size) <= alloc_top;
1086 base = _ALIGN_UP(base + 0x100000, align)) {
1087 prom_debug(" trying: 0x%x\n\r", base);
1088 addr = (unsigned long)prom_claim(base, size, 0);
1089 if (addr != PROM_ERROR && addr != 0)
1090 break;
1091 addr = 0;
1092 if (align == 0)
1093 break;
1094 }
1095 if (addr == 0)
1096 return 0;
1097 alloc_bottom = addr + size;
1098
1099 prom_debug(" -> %x\n", addr);
1100 prom_debug(" alloc_bottom : %x\n", alloc_bottom);
1101 prom_debug(" alloc_top : %x\n", alloc_top);
1102 prom_debug(" alloc_top_hi : %x\n", alloc_top_high);
1103 prom_debug(" rmo_top : %x\n", rmo_top);
1104 prom_debug(" ram_top : %x\n", ram_top);
1105
1106 return addr;
1107}
1108
1109/*
1110 * Allocates memory downward, either from top of RMO, or if highmem
1111 * is set, from the top of RAM. Note that this one doesn't handle
1112 * failures. It does claim memory if highmem is not set.
1113 */
1114static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1115 int highmem)
1116{
1117 unsigned long base, addr = 0;
1118
1119 prom_debug("alloc_down(%x, %x, %s)\n", size, align,
1120 highmem ? "(high)" : "(low)");
1121 if (ram_top == 0)
1122 prom_panic("alloc_down() called with mem not initialized\n");
1123
1124 if (highmem) {
1125 /* Carve out storage for the TCE table. */
1126 addr = _ALIGN_DOWN(alloc_top_high - size, align);
1127 if (addr <= alloc_bottom)
1128 return 0;
1129 /* Will we bump into the RMO ? If yes, check out that we
1130 * didn't overlap existing allocations there, if we did,
1131 * we are dead, we must be the first in town !
1132 */
1133 if (addr < rmo_top) {
1134 /* Good, we are first */
1135 if (alloc_top == rmo_top)
1136 alloc_top = rmo_top = addr;
1137 else
1138 return 0;
1139 }
1140 alloc_top_high = addr;
1141 goto bail;
1142 }
1143
1144 base = _ALIGN_DOWN(alloc_top - size, align);
1145 for (; base > alloc_bottom;
1146 base = _ALIGN_DOWN(base - 0x100000, align)) {
1147 prom_debug(" trying: 0x%x\n\r", base);
1148 addr = (unsigned long)prom_claim(base, size, 0);
1149 if (addr != PROM_ERROR && addr != 0)
1150 break;
1151 addr = 0;
1152 }
1153 if (addr == 0)
1154 return 0;
1155 alloc_top = addr;
1156
1157 bail:
1158 prom_debug(" -> %x\n", addr);
1159 prom_debug(" alloc_bottom : %x\n", alloc_bottom);
1160 prom_debug(" alloc_top : %x\n", alloc_top);
1161 prom_debug(" alloc_top_hi : %x\n", alloc_top_high);
1162 prom_debug(" rmo_top : %x\n", rmo_top);
1163 prom_debug(" ram_top : %x\n", ram_top);
1164
1165 return addr;
1166}
1167
1168/*
1169 * Parse a "reg" cell
1170 */
1171static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1172{
1173 cell_t *p = *cellp;
1174 unsigned long r = 0;
1175
1176 /* Ignore more than 2 cells */
1177 while (s > sizeof(unsigned long) / 4) {
1178 p++;
1179 s--;
1180 }
1181 r = be32_to_cpu(*p++);
1182#ifdef CONFIG_PPC64
1183 if (s > 1) {
1184 r <<= 32;
1185 r |= be32_to_cpu(*(p++));
1186 }
1187#endif
1188 *cellp = p;
1189 return r;
1190}
1191
1192/*
1193 * Very dumb function for adding to the memory reserve list, but
1194 * we don't need anything smarter at this point
1195 *
1196 * XXX Eventually check for collisions. They should NEVER happen.
1197 * If problems seem to show up, it would be a good start to track
1198 * them down.
1199 */
1200static void __init reserve_mem(u64 base, u64 size)
1201{
1202 u64 top = base + size;
1203 unsigned long cnt = mem_reserve_cnt;
1204
1205 if (size == 0)
1206 return;
1207
1208 /* We need to always keep one empty entry so that we
1209 * have our terminator with "size" set to 0 since we are
1210 * dumb and just copy this entire array to the boot params
1211 */
1212 base = _ALIGN_DOWN(base, PAGE_SIZE);
1213 top = _ALIGN_UP(top, PAGE_SIZE);
1214 size = top - base;
1215
1216 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1217 prom_panic("Memory reserve map exhausted !\n");
1218 mem_reserve_map[cnt].base = cpu_to_be64(base);
1219 mem_reserve_map[cnt].size = cpu_to_be64(size);
1220 mem_reserve_cnt = cnt + 1;
1221}
1222
1223/*
1224 * Initialize memory allocation mechanism, parse "memory" nodes and
1225 * obtain that way the top of memory and RMO to setup out local allocator
1226 */
1227static void __init prom_init_mem(void)
1228{
1229 phandle node;
1230 char *path, type[64];
1231 unsigned int plen;
1232 cell_t *p, *endp;
1233 __be32 val;
1234 u32 rac, rsc;
1235
1236 /*
1237 * We iterate the memory nodes to find
1238 * 1) top of RMO (first node)
1239 * 2) top of memory
1240 */
1241 val = cpu_to_be32(2);
1242 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1243 rac = be32_to_cpu(val);
1244 val = cpu_to_be32(1);
1245 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1246 rsc = be32_to_cpu(val);
1247 prom_debug("root_addr_cells: %x\n", rac);
1248 prom_debug("root_size_cells: %x\n", rsc);
1249
1250 prom_debug("scanning memory:\n");
1251 path = prom_scratch;
1252
1253 for (node = 0; prom_next_node(&node); ) {
1254 type[0] = 0;
1255 prom_getprop(node, "device_type", type, sizeof(type));
1256
1257 if (type[0] == 0) {
1258 /*
1259 * CHRP Longtrail machines have no device_type
1260 * on the memory node, so check the name instead...
1261 */
1262 prom_getprop(node, "name", type, sizeof(type));
1263 }
1264 if (strcmp(type, "memory"))
1265 continue;
1266
1267 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1268 if (plen > sizeof(regbuf)) {
1269 prom_printf("memory node too large for buffer !\n");
1270 plen = sizeof(regbuf);
1271 }
1272 p = regbuf;
1273 endp = p + (plen / sizeof(cell_t));
1274
1275#ifdef DEBUG_PROM
1276 memset(path, 0, PROM_SCRATCH_SIZE);
1277 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1278 prom_debug(" node %s :\n", path);
1279#endif /* DEBUG_PROM */
1280
1281 while ((endp - p) >= (rac + rsc)) {
1282 unsigned long base, size;
1283
1284 base = prom_next_cell(rac, &p);
1285 size = prom_next_cell(rsc, &p);
1286
1287 if (size == 0)
1288 continue;
1289 prom_debug(" %x %x\n", base, size);
1290 if (base == 0 && (of_platform & PLATFORM_LPAR))
1291 rmo_top = size;
1292 if ((base + size) > ram_top)
1293 ram_top = base + size;
1294 }
1295 }
1296
1297 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1298
1299 /*
1300 * If prom_memory_limit is set we reduce the upper limits *except* for
1301 * alloc_top_high. This must be the real top of RAM so we can put
1302 * TCE's up there.
1303 */
1304
1305 alloc_top_high = ram_top;
1306
1307 if (prom_memory_limit) {
1308 if (prom_memory_limit <= alloc_bottom) {
1309 prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
1310 prom_memory_limit);
1311 prom_memory_limit = 0;
1312 } else if (prom_memory_limit >= ram_top) {
1313 prom_printf("Ignoring mem=%x >= ram_top.\n",
1314 prom_memory_limit);
1315 prom_memory_limit = 0;
1316 } else {
1317 ram_top = prom_memory_limit;
1318 rmo_top = min(rmo_top, prom_memory_limit);
1319 }
1320 }
1321
1322 /*
1323 * Setup our top alloc point, that is top of RMO or top of
1324 * segment 0 when running non-LPAR.
1325 * Some RS64 machines have buggy firmware where claims up at
1326 * 1GB fail. Cap at 768MB as a workaround.
1327 * Since 768MB is plenty of room, and we need to cap to something
1328 * reasonable on 32-bit, cap at 768MB on all machines.
1329 */
1330 if (!rmo_top)
1331 rmo_top = ram_top;
1332 rmo_top = min(0x30000000ul, rmo_top);
1333 alloc_top = rmo_top;
1334 alloc_top_high = ram_top;
1335
1336 /*
1337 * Check if we have an initrd after the kernel but still inside
1338 * the RMO. If we do move our bottom point to after it.
1339 */
1340 if (prom_initrd_start &&
1341 prom_initrd_start < rmo_top &&
1342 prom_initrd_end > alloc_bottom)
1343 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1344
1345 prom_printf("memory layout at init:\n");
1346 prom_printf(" memory_limit : %x (16 MB aligned)\n", prom_memory_limit);
1347 prom_printf(" alloc_bottom : %x\n", alloc_bottom);
1348 prom_printf(" alloc_top : %x\n", alloc_top);
1349 prom_printf(" alloc_top_hi : %x\n", alloc_top_high);
1350 prom_printf(" rmo_top : %x\n", rmo_top);
1351 prom_printf(" ram_top : %x\n", ram_top);
1352}
1353
1354static void __init prom_close_stdin(void)
1355{
1356 __be32 val;
1357 ihandle stdin;
1358
1359 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1360 stdin = be32_to_cpu(val);
1361 call_prom("close", 1, 0, stdin);
1362 }
1363}
1364
1365#ifdef CONFIG_PPC_POWERNV
1366
1367#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1368static u64 __initdata prom_opal_base;
1369static u64 __initdata prom_opal_entry;
1370#endif
1371
1372/*
1373 * Allocate room for and instantiate OPAL
1374 */
1375static void __init prom_instantiate_opal(void)
1376{
1377 phandle opal_node;
1378 ihandle opal_inst;
1379 u64 base, entry;
1380 u64 size = 0, align = 0x10000;
1381 __be64 val64;
1382 u32 rets[2];
1383
1384 prom_debug("prom_instantiate_opal: start...\n");
1385
1386 opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal"));
1387 prom_debug("opal_node: %x\n", opal_node);
1388 if (!PHANDLE_VALID(opal_node))
1389 return;
1390
1391 val64 = 0;
1392 prom_getprop(opal_node, "opal-runtime-size", &val64, sizeof(val64));
1393 size = be64_to_cpu(val64);
1394 if (size == 0)
1395 return;
1396 val64 = 0;
1397 prom_getprop(opal_node, "opal-runtime-alignment", &val64,sizeof(val64));
1398 align = be64_to_cpu(val64);
1399
1400 base = alloc_down(size, align, 0);
1401 if (base == 0) {
1402 prom_printf("OPAL allocation failed !\n");
1403 return;
1404 }
1405
1406 opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal"));
1407 if (!IHANDLE_VALID(opal_inst)) {
1408 prom_printf("opening opal package failed (%x)\n", opal_inst);
1409 return;
1410 }
1411
1412 prom_printf("instantiating opal at 0x%x...", base);
1413
1414 if (call_prom_ret("call-method", 4, 3, rets,
1415 ADDR("load-opal-runtime"),
1416 opal_inst,
1417 base >> 32, base & 0xffffffff) != 0
1418 || (rets[0] == 0 && rets[1] == 0)) {
1419 prom_printf(" failed\n");
1420 return;
1421 }
1422 entry = (((u64)rets[0]) << 32) | rets[1];
1423
1424 prom_printf(" done\n");
1425
1426 reserve_mem(base, size);
1427
1428 prom_debug("opal base = 0x%x\n", base);
1429 prom_debug("opal align = 0x%x\n", align);
1430 prom_debug("opal entry = 0x%x\n", entry);
1431 prom_debug("opal size = 0x%x\n", (long)size);
1432
1433 prom_setprop(opal_node, "/ibm,opal", "opal-base-address",
1434 &base, sizeof(base));
1435 prom_setprop(opal_node, "/ibm,opal", "opal-entry-address",
1436 &entry, sizeof(entry));
1437
1438#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1439 prom_opal_base = base;
1440 prom_opal_entry = entry;
1441#endif
1442 prom_debug("prom_instantiate_opal: end...\n");
1443}
1444
1445#endif /* CONFIG_PPC_POWERNV */
1446
1447/*
1448 * Allocate room for and instantiate RTAS
1449 */
1450static void __init prom_instantiate_rtas(void)
1451{
1452 phandle rtas_node;
1453 ihandle rtas_inst;
1454 u32 base, entry = 0;
1455 __be32 val;
1456 u32 size = 0;
1457
1458 prom_debug("prom_instantiate_rtas: start...\n");
1459
1460 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1461 prom_debug("rtas_node: %x\n", rtas_node);
1462 if (!PHANDLE_VALID(rtas_node))
1463 return;
1464
1465 val = 0;
1466 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1467 size = be32_to_cpu(val);
1468 if (size == 0)
1469 return;
1470
1471 base = alloc_down(size, PAGE_SIZE, 0);
1472 if (base == 0)
1473 prom_panic("Could not allocate memory for RTAS\n");
1474
1475 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1476 if (!IHANDLE_VALID(rtas_inst)) {
1477 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1478 return;
1479 }
1480
1481 prom_printf("instantiating rtas at 0x%x...", base);
1482
1483 if (call_prom_ret("call-method", 3, 2, &entry,
1484 ADDR("instantiate-rtas"),
1485 rtas_inst, base) != 0
1486 || entry == 0) {
1487 prom_printf(" failed\n");
1488 return;
1489 }
1490 prom_printf(" done\n");
1491
1492 reserve_mem(base, size);
1493
1494 val = cpu_to_be32(base);
1495 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1496 &val, sizeof(val));
1497 val = cpu_to_be32(entry);
1498 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1499 &val, sizeof(val));
1500
1501 /* Check if it supports "query-cpu-stopped-state" */
1502 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1503 &val, sizeof(val)) != PROM_ERROR)
1504 rtas_has_query_cpu_stopped = true;
1505
1506 prom_debug("rtas base = 0x%x\n", base);
1507 prom_debug("rtas entry = 0x%x\n", entry);
1508 prom_debug("rtas size = 0x%x\n", (long)size);
1509
1510 prom_debug("prom_instantiate_rtas: end...\n");
1511}
1512
1513#ifdef CONFIG_PPC64
1514/*
1515 * Allocate room for and instantiate Stored Measurement Log (SML)
1516 */
1517static void __init prom_instantiate_sml(void)
1518{
1519 phandle ibmvtpm_node;
1520 ihandle ibmvtpm_inst;
1521 u32 entry = 0, size = 0, succ = 0;
1522 u64 base;
1523 __be32 val;
1524
1525 prom_debug("prom_instantiate_sml: start...\n");
1526
1527 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1528 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1529 if (!PHANDLE_VALID(ibmvtpm_node))
1530 return;
1531
1532 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1533 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1534 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1535 return;
1536 }
1537
1538 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1539 &val, sizeof(val)) != PROM_ERROR) {
1540 if (call_prom_ret("call-method", 2, 2, &succ,
1541 ADDR("reformat-sml-to-efi-alignment"),
1542 ibmvtpm_inst) != 0 || succ == 0) {
1543 prom_printf("Reformat SML to EFI alignment failed\n");
1544 return;
1545 }
1546
1547 if (call_prom_ret("call-method", 2, 2, &size,
1548 ADDR("sml-get-allocated-size"),
1549 ibmvtpm_inst) != 0 || size == 0) {
1550 prom_printf("SML get allocated size failed\n");
1551 return;
1552 }
1553 } else {
1554 if (call_prom_ret("call-method", 2, 2, &size,
1555 ADDR("sml-get-handover-size"),
1556 ibmvtpm_inst) != 0 || size == 0) {
1557 prom_printf("SML get handover size failed\n");
1558 return;
1559 }
1560 }
1561
1562 base = alloc_down(size, PAGE_SIZE, 0);
1563 if (base == 0)
1564 prom_panic("Could not allocate memory for sml\n");
1565
1566 prom_printf("instantiating sml at 0x%x...", base);
1567
1568 memset((void *)base, 0, size);
1569
1570 if (call_prom_ret("call-method", 4, 2, &entry,
1571 ADDR("sml-handover"),
1572 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1573 prom_printf("SML handover failed\n");
1574 return;
1575 }
1576 prom_printf(" done\n");
1577
1578 reserve_mem(base, size);
1579
1580 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1581 &base, sizeof(base));
1582 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1583 &size, sizeof(size));
1584
1585 prom_debug("sml base = 0x%x\n", base);
1586 prom_debug("sml size = 0x%x\n", (long)size);
1587
1588 prom_debug("prom_instantiate_sml: end...\n");
1589}
1590
1591/*
1592 * Allocate room for and initialize TCE tables
1593 */
1594#ifdef __BIG_ENDIAN__
1595static void __init prom_initialize_tce_table(void)
1596{
1597 phandle node;
1598 ihandle phb_node;
1599 char compatible[64], type[64], model[64];
1600 char *path = prom_scratch;
1601 u64 base, align;
1602 u32 minalign, minsize;
1603 u64 tce_entry, *tce_entryp;
1604 u64 local_alloc_top, local_alloc_bottom;
1605 u64 i;
1606
1607 if (prom_iommu_off)
1608 return;
1609
1610 prom_debug("starting prom_initialize_tce_table\n");
1611
1612 /* Cache current top of allocs so we reserve a single block */
1613 local_alloc_top = alloc_top_high;
1614 local_alloc_bottom = local_alloc_top;
1615
1616 /* Search all nodes looking for PHBs. */
1617 for (node = 0; prom_next_node(&node); ) {
1618 compatible[0] = 0;
1619 type[0] = 0;
1620 model[0] = 0;
1621 prom_getprop(node, "compatible",
1622 compatible, sizeof(compatible));
1623 prom_getprop(node, "device_type", type, sizeof(type));
1624 prom_getprop(node, "model", model, sizeof(model));
1625
1626 if ((type[0] == 0) || (strstr(type, "pci") == NULL))
1627 continue;
1628
1629 /* Keep the old logic intact to avoid regression. */
1630 if (compatible[0] != 0) {
1631 if ((strstr(compatible, "python") == NULL) &&
1632 (strstr(compatible, "Speedwagon") == NULL) &&
1633 (strstr(compatible, "Winnipeg") == NULL))
1634 continue;
1635 } else if (model[0] != 0) {
1636 if ((strstr(model, "ython") == NULL) &&
1637 (strstr(model, "peedwagon") == NULL) &&
1638 (strstr(model, "innipeg") == NULL))
1639 continue;
1640 }
1641
1642 if (prom_getprop(node, "tce-table-minalign", &minalign,
1643 sizeof(minalign)) == PROM_ERROR)
1644 minalign = 0;
1645 if (prom_getprop(node, "tce-table-minsize", &minsize,
1646 sizeof(minsize)) == PROM_ERROR)
1647 minsize = 4UL << 20;
1648
1649 /*
1650 * Even though we read what OF wants, we just set the table
1651 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1652 * By doing this, we avoid the pitfalls of trying to DMA to
1653 * MMIO space and the DMA alias hole.
1654 *
1655 * On POWER4, firmware sets the TCE region by assuming
1656 * each TCE table is 8MB. Using this memory for anything
1657 * else will impact performance, so we always allocate 8MB.
1658 * Anton
1659 */
1660 if (pvr_version_is(PVR_POWER4) || pvr_version_is(PVR_POWER4p))
1661 minsize = 8UL << 20;
1662 else
1663 minsize = 4UL << 20;
1664
1665 /* Align to the greater of the align or size */
1666 align = max(minalign, minsize);
1667 base = alloc_down(minsize, align, 1);
1668 if (base == 0)
1669 prom_panic("ERROR, cannot find space for TCE table.\n");
1670 if (base < local_alloc_bottom)
1671 local_alloc_bottom = base;
1672
1673 /* It seems OF doesn't null-terminate the path :-( */
1674 memset(path, 0, PROM_SCRATCH_SIZE);
1675 /* Call OF to setup the TCE hardware */
1676 if (call_prom("package-to-path", 3, 1, node,
1677 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
1678 prom_printf("package-to-path failed\n");
1679 }
1680
1681 /* Save away the TCE table attributes for later use. */
1682 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
1683 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
1684
1685 prom_debug("TCE table: %s\n", path);
1686 prom_debug("\tnode = 0x%x\n", node);
1687 prom_debug("\tbase = 0x%x\n", base);
1688 prom_debug("\tsize = 0x%x\n", minsize);
1689
1690 /* Initialize the table to have a one-to-one mapping
1691 * over the allocated size.
1692 */
1693 tce_entryp = (u64 *)base;
1694 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
1695 tce_entry = (i << PAGE_SHIFT);
1696 tce_entry |= 0x3;
1697 *tce_entryp = tce_entry;
1698 }
1699
1700 prom_printf("opening PHB %s", path);
1701 phb_node = call_prom("open", 1, 1, path);
1702 if (phb_node == 0)
1703 prom_printf("... failed\n");
1704 else
1705 prom_printf("... done\n");
1706
1707 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1708 phb_node, -1, minsize,
1709 (u32) base, (u32) (base >> 32));
1710 call_prom("close", 1, 0, phb_node);
1711 }
1712
1713 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
1714
1715 /* These are only really needed if there is a memory limit in
1716 * effect, but we don't know so export them always. */
1717 prom_tce_alloc_start = local_alloc_bottom;
1718 prom_tce_alloc_end = local_alloc_top;
1719
1720 /* Flag the first invalid entry */
1721 prom_debug("ending prom_initialize_tce_table\n");
1722}
1723#endif /* __BIG_ENDIAN__ */
1724#endif /* CONFIG_PPC64 */
1725
1726/*
1727 * With CHRP SMP we need to use the OF to start the other processors.
1728 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1729 * so we have to put the processors into a holding pattern controlled
1730 * by the kernel (not OF) before we destroy the OF.
1731 *
1732 * This uses a chunk of low memory, puts some holding pattern
1733 * code there and sends the other processors off to there until
1734 * smp_boot_cpus tells them to do something. The holding pattern
1735 * checks that address until its cpu # is there, when it is that
1736 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1737 * of setting those values.
1738 *
1739 * We also use physical address 0x4 here to tell when a cpu
1740 * is in its holding pattern code.
1741 *
1742 * -- Cort
1743 */
1744/*
1745 * We want to reference the copy of __secondary_hold_* in the
1746 * 0 - 0x100 address range
1747 */
1748#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
1749
1750static void __init prom_hold_cpus(void)
1751{
1752 unsigned long i;
1753 phandle node;
1754 char type[64];
1755 unsigned long *spinloop
1756 = (void *) LOW_ADDR(__secondary_hold_spinloop);
1757 unsigned long *acknowledge
1758 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
1759 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
1760
1761 /*
1762 * On pseries, if RTAS supports "query-cpu-stopped-state",
1763 * we skip this stage, the CPUs will be started by the
1764 * kernel using RTAS.
1765 */
1766 if ((of_platform == PLATFORM_PSERIES ||
1767 of_platform == PLATFORM_PSERIES_LPAR) &&
1768 rtas_has_query_cpu_stopped) {
1769 prom_printf("prom_hold_cpus: skipped\n");
1770 return;
1771 }
1772
1773 prom_debug("prom_hold_cpus: start...\n");
1774 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
1775 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
1776 prom_debug(" 1) acknowledge = 0x%x\n",
1777 (unsigned long)acknowledge);
1778 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
1779 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
1780
1781 /* Set the common spinloop variable, so all of the secondary cpus
1782 * will block when they are awakened from their OF spinloop.
1783 * This must occur for both SMP and non SMP kernels, since OF will
1784 * be trashed when we move the kernel.
1785 */
1786 *spinloop = 0;
1787
1788 /* look for cpus */
1789 for (node = 0; prom_next_node(&node); ) {
1790 unsigned int cpu_no;
1791 __be32 reg;
1792
1793 type[0] = 0;
1794 prom_getprop(node, "device_type", type, sizeof(type));
1795 if (strcmp(type, "cpu") != 0)
1796 continue;
1797
1798 /* Skip non-configured cpus. */
1799 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1800 if (strcmp(type, "okay") != 0)
1801 continue;
1802
1803 reg = cpu_to_be32(-1); /* make sparse happy */
1804 prom_getprop(node, "reg", ®, sizeof(reg));
1805 cpu_no = be32_to_cpu(reg);
1806
1807 prom_debug("cpu hw idx = %lu\n", cpu_no);
1808
1809 /* Init the acknowledge var which will be reset by
1810 * the secondary cpu when it awakens from its OF
1811 * spinloop.
1812 */
1813 *acknowledge = (unsigned long)-1;
1814
1815 if (cpu_no != prom.cpu) {
1816 /* Primary Thread of non-boot cpu or any thread */
1817 prom_printf("starting cpu hw idx %lu... ", cpu_no);
1818 call_prom("start-cpu", 3, 0, node,
1819 secondary_hold, cpu_no);
1820
1821 for (i = 0; (i < 100000000) &&
1822 (*acknowledge == ((unsigned long)-1)); i++ )
1823 mb();
1824
1825 if (*acknowledge == cpu_no)
1826 prom_printf("done\n");
1827 else
1828 prom_printf("failed: %x\n", *acknowledge);
1829 }
1830#ifdef CONFIG_SMP
1831 else
1832 prom_printf("boot cpu hw idx %lu\n", cpu_no);
1833#endif /* CONFIG_SMP */
1834 }
1835
1836 prom_debug("prom_hold_cpus: end...\n");
1837}
1838
1839
1840static void __init prom_init_client_services(unsigned long pp)
1841{
1842 /* Get a handle to the prom entry point before anything else */
1843 prom_entry = pp;
1844
1845 /* get a handle for the stdout device */
1846 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
1847 if (!PHANDLE_VALID(prom.chosen))
1848 prom_panic("cannot find chosen"); /* msg won't be printed :( */
1849
1850 /* get device tree root */
1851 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
1852 if (!PHANDLE_VALID(prom.root))
1853 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
1854
1855 prom.mmumap = 0;
1856}
1857
1858#ifdef CONFIG_PPC32
1859/*
1860 * For really old powermacs, we need to map things we claim.
1861 * For that, we need the ihandle of the mmu.
1862 * Also, on the longtrail, we need to work around other bugs.
1863 */
1864static void __init prom_find_mmu(void)
1865{
1866 phandle oprom;
1867 char version[64];
1868
1869 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
1870 if (!PHANDLE_VALID(oprom))
1871 return;
1872 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
1873 return;
1874 version[sizeof(version) - 1] = 0;
1875 /* XXX might need to add other versions here */
1876 if (strcmp(version, "Open Firmware, 1.0.5") == 0)
1877 of_workarounds = OF_WA_CLAIM;
1878 else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
1879 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
1880 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
1881 } else
1882 return;
1883 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
1884 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
1885 sizeof(prom.mmumap));
1886 prom.mmumap = be32_to_cpu(prom.mmumap);
1887 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
1888 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
1889}
1890#else
1891#define prom_find_mmu()
1892#endif
1893
1894static void __init prom_init_stdout(void)
1895{
1896 char *path = of_stdout_device;
1897 char type[16];
1898 phandle stdout_node;
1899 __be32 val;
1900
1901 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
1902 prom_panic("cannot find stdout");
1903
1904 prom.stdout = be32_to_cpu(val);
1905
1906 /* Get the full OF pathname of the stdout device */
1907 memset(path, 0, 256);
1908 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
1909 prom_printf("OF stdout device is: %s\n", of_stdout_device);
1910 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
1911 path, strlen(path) + 1);
1912
1913 /* instance-to-package fails on PA-Semi */
1914 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
1915 if (stdout_node != PROM_ERROR) {
1916 val = cpu_to_be32(stdout_node);
1917 prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
1918 &val, sizeof(val));
1919
1920 /* If it's a display, note it */
1921 memset(type, 0, sizeof(type));
1922 prom_getprop(stdout_node, "device_type", type, sizeof(type));
1923 if (strcmp(type, "display") == 0)
1924 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
1925 }
1926}
1927
1928static int __init prom_find_machine_type(void)
1929{
1930 char compat[256];
1931 int len, i = 0;
1932#ifdef CONFIG_PPC64
1933 phandle rtas;
1934 int x;
1935#endif
1936
1937 /* Look for a PowerMac or a Cell */
1938 len = prom_getprop(prom.root, "compatible",
1939 compat, sizeof(compat)-1);
1940 if (len > 0) {
1941 compat[len] = 0;
1942 while (i < len) {
1943 char *p = &compat[i];
1944 int sl = strlen(p);
1945 if (sl == 0)
1946 break;
1947 if (strstr(p, "Power Macintosh") ||
1948 strstr(p, "MacRISC"))
1949 return PLATFORM_POWERMAC;
1950#ifdef CONFIG_PPC64
1951 /* We must make sure we don't detect the IBM Cell
1952 * blades as pSeries due to some firmware issues,
1953 * so we do it here.
1954 */
1955 if (strstr(p, "IBM,CBEA") ||
1956 strstr(p, "IBM,CPBW-1.0"))
1957 return PLATFORM_GENERIC;
1958#endif /* CONFIG_PPC64 */
1959 i += sl + 1;
1960 }
1961 }
1962#ifdef CONFIG_PPC64
1963 /* Try to detect OPAL */
1964 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal"))))
1965 return PLATFORM_OPAL;
1966
1967 /* Try to figure out if it's an IBM pSeries or any other
1968 * PAPR compliant platform. We assume it is if :
1969 * - /device_type is "chrp" (please, do NOT use that for future
1970 * non-IBM designs !
1971 * - it has /rtas
1972 */
1973 len = prom_getprop(prom.root, "device_type",
1974 compat, sizeof(compat)-1);
1975 if (len <= 0)
1976 return PLATFORM_GENERIC;
1977 if (strcmp(compat, "chrp"))
1978 return PLATFORM_GENERIC;
1979
1980 /* Default to pSeries. We need to know if we are running LPAR */
1981 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1982 if (!PHANDLE_VALID(rtas))
1983 return PLATFORM_GENERIC;
1984 x = prom_getproplen(rtas, "ibm,hypertas-functions");
1985 if (x != PROM_ERROR) {
1986 prom_debug("Hypertas detected, assuming LPAR !\n");
1987 return PLATFORM_PSERIES_LPAR;
1988 }
1989 return PLATFORM_PSERIES;
1990#else
1991 return PLATFORM_GENERIC;
1992#endif
1993}
1994
1995static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
1996{
1997 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
1998}
1999
2000/*
2001 * If we have a display that we don't know how to drive,
2002 * we will want to try to execute OF's open method for it
2003 * later. However, OF will probably fall over if we do that
2004 * we've taken over the MMU.
2005 * So we check whether we will need to open the display,
2006 * and if so, open it now.
2007 */
2008static void __init prom_check_displays(void)
2009{
2010 char type[16], *path;
2011 phandle node;
2012 ihandle ih;
2013 int i;
2014
2015 static unsigned char default_colors[] = {
2016 0x00, 0x00, 0x00,
2017 0x00, 0x00, 0xaa,
2018 0x00, 0xaa, 0x00,
2019 0x00, 0xaa, 0xaa,
2020 0xaa, 0x00, 0x00,
2021 0xaa, 0x00, 0xaa,
2022 0xaa, 0xaa, 0x00,
2023 0xaa, 0xaa, 0xaa,
2024 0x55, 0x55, 0x55,
2025 0x55, 0x55, 0xff,
2026 0x55, 0xff, 0x55,
2027 0x55, 0xff, 0xff,
2028 0xff, 0x55, 0x55,
2029 0xff, 0x55, 0xff,
2030 0xff, 0xff, 0x55,
2031 0xff, 0xff, 0xff
2032 };
2033 const unsigned char *clut;
2034
2035 prom_debug("Looking for displays\n");
2036 for (node = 0; prom_next_node(&node); ) {
2037 memset(type, 0, sizeof(type));
2038 prom_getprop(node, "device_type", type, sizeof(type));
2039 if (strcmp(type, "display") != 0)
2040 continue;
2041
2042 /* It seems OF doesn't null-terminate the path :-( */
2043 path = prom_scratch;
2044 memset(path, 0, PROM_SCRATCH_SIZE);
2045
2046 /*
2047 * leave some room at the end of the path for appending extra
2048 * arguments
2049 */
2050 if (call_prom("package-to-path", 3, 1, node, path,
2051 PROM_SCRATCH_SIZE-10) == PROM_ERROR)
2052 continue;
2053 prom_printf("found display : %s, opening... ", path);
2054
2055 ih = call_prom("open", 1, 1, path);
2056 if (ih == 0) {
2057 prom_printf("failed\n");
2058 continue;
2059 }
2060
2061 /* Success */
2062 prom_printf("done\n");
2063 prom_setprop(node, path, "linux,opened", NULL, 0);
2064
2065 /* Setup a usable color table when the appropriate
2066 * method is available. Should update this to set-colors */
2067 clut = default_colors;
2068 for (i = 0; i < 16; i++, clut += 3)
2069 if (prom_set_color(ih, i, clut[0], clut[1],
2070 clut[2]) != 0)
2071 break;
2072
2073#ifdef CONFIG_LOGO_LINUX_CLUT224
2074 clut = PTRRELOC(logo_linux_clut224.clut);
2075 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2076 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2077 clut[2]) != 0)
2078 break;
2079#endif /* CONFIG_LOGO_LINUX_CLUT224 */
2080
2081#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2082 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2083 PROM_ERROR) {
2084 u32 width, height, pitch, addr;
2085
2086 prom_printf("Setting btext !\n");
2087 prom_getprop(node, "width", &width, 4);
2088 prom_getprop(node, "height", &height, 4);
2089 prom_getprop(node, "linebytes", &pitch, 4);
2090 prom_getprop(node, "address", &addr, 4);
2091 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2092 width, height, pitch, addr);
2093 btext_setup_display(width, height, 8, pitch, addr);
2094 }
2095#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2096 }
2097}
2098
2099
2100/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2101static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2102 unsigned long needed, unsigned long align)
2103{
2104 void *ret;
2105
2106 *mem_start = _ALIGN(*mem_start, align);
2107 while ((*mem_start + needed) > *mem_end) {
2108 unsigned long room, chunk;
2109
2110 prom_debug("Chunk exhausted, claiming more at %x...\n",
2111 alloc_bottom);
2112 room = alloc_top - alloc_bottom;
2113 if (room > DEVTREE_CHUNK_SIZE)
2114 room = DEVTREE_CHUNK_SIZE;
2115 if (room < PAGE_SIZE)
2116 prom_panic("No memory for flatten_device_tree "
2117 "(no room)\n");
2118 chunk = alloc_up(room, 0);
2119 if (chunk == 0)
2120 prom_panic("No memory for flatten_device_tree "
2121 "(claim failed)\n");
2122 *mem_end = chunk + room;
2123 }
2124
2125 ret = (void *)*mem_start;
2126 *mem_start += needed;
2127
2128 return ret;
2129}
2130
2131#define dt_push_token(token, mem_start, mem_end) do { \
2132 void *room = make_room(mem_start, mem_end, 4, 4); \
2133 *(__be32 *)room = cpu_to_be32(token); \
2134 } while(0)
2135
2136static unsigned long __init dt_find_string(char *str)
2137{
2138 char *s, *os;
2139
2140 s = os = (char *)dt_string_start;
2141 s += 4;
2142 while (s < (char *)dt_string_end) {
2143 if (strcmp(s, str) == 0)
2144 return s - os;
2145 s += strlen(s) + 1;
2146 }
2147 return 0;
2148}
2149
2150/*
2151 * The Open Firmware 1275 specification states properties must be 31 bytes or
2152 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2153 */
2154#define MAX_PROPERTY_NAME 64
2155
2156static void __init scan_dt_build_strings(phandle node,
2157 unsigned long *mem_start,
2158 unsigned long *mem_end)
2159{
2160 char *prev_name, *namep, *sstart;
2161 unsigned long soff;
2162 phandle child;
2163
2164 sstart = (char *)dt_string_start;
2165
2166 /* get and store all property names */
2167 prev_name = "";
2168 for (;;) {
2169 /* 64 is max len of name including nul. */
2170 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2171 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2172 /* No more nodes: unwind alloc */
2173 *mem_start = (unsigned long)namep;
2174 break;
2175 }
2176
2177 /* skip "name" */
2178 if (strcmp(namep, "name") == 0) {
2179 *mem_start = (unsigned long)namep;
2180 prev_name = "name";
2181 continue;
2182 }
2183 /* get/create string entry */
2184 soff = dt_find_string(namep);
2185 if (soff != 0) {
2186 *mem_start = (unsigned long)namep;
2187 namep = sstart + soff;
2188 } else {
2189 /* Trim off some if we can */
2190 *mem_start = (unsigned long)namep + strlen(namep) + 1;
2191 dt_string_end = *mem_start;
2192 }
2193 prev_name = namep;
2194 }
2195
2196 /* do all our children */
2197 child = call_prom("child", 1, 1, node);
2198 while (child != 0) {
2199 scan_dt_build_strings(child, mem_start, mem_end);
2200 child = call_prom("peer", 1, 1, child);
2201 }
2202}
2203
2204static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2205 unsigned long *mem_end)
2206{
2207 phandle child;
2208 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2209 unsigned long soff;
2210 unsigned char *valp;
2211 static char pname[MAX_PROPERTY_NAME];
2212 int l, room, has_phandle = 0;
2213
2214 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2215
2216 /* get the node's full name */
2217 namep = (char *)*mem_start;
2218 room = *mem_end - *mem_start;
2219 if (room > 255)
2220 room = 255;
2221 l = call_prom("package-to-path", 3, 1, node, namep, room);
2222 if (l >= 0) {
2223 /* Didn't fit? Get more room. */
2224 if (l >= room) {
2225 if (l >= *mem_end - *mem_start)
2226 namep = make_room(mem_start, mem_end, l+1, 1);
2227 call_prom("package-to-path", 3, 1, node, namep, l);
2228 }
2229 namep[l] = '\0';
2230
2231 /* Fixup an Apple bug where they have bogus \0 chars in the
2232 * middle of the path in some properties, and extract
2233 * the unit name (everything after the last '/').
2234 */
2235 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2236 if (*p == '/')
2237 lp = namep;
2238 else if (*p != 0)
2239 *lp++ = *p;
2240 }
2241 *lp = 0;
2242 *mem_start = _ALIGN((unsigned long)lp + 1, 4);
2243 }
2244
2245 /* get it again for debugging */
2246 path = prom_scratch;
2247 memset(path, 0, PROM_SCRATCH_SIZE);
2248 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
2249
2250 /* get and store all properties */
2251 prev_name = "";
2252 sstart = (char *)dt_string_start;
2253 for (;;) {
2254 if (call_prom("nextprop", 3, 1, node, prev_name,
2255 pname) != 1)
2256 break;
2257
2258 /* skip "name" */
2259 if (strcmp(pname, "name") == 0) {
2260 prev_name = "name";
2261 continue;
2262 }
2263
2264 /* find string offset */
2265 soff = dt_find_string(pname);
2266 if (soff == 0) {
2267 prom_printf("WARNING: Can't find string index for"
2268 " <%s>, node %s\n", pname, path);
2269 break;
2270 }
2271 prev_name = sstart + soff;
2272
2273 /* get length */
2274 l = call_prom("getproplen", 2, 1, node, pname);
2275
2276 /* sanity checks */
2277 if (l == PROM_ERROR)
2278 continue;
2279
2280 /* push property head */
2281 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2282 dt_push_token(l, mem_start, mem_end);
2283 dt_push_token(soff, mem_start, mem_end);
2284
2285 /* push property content */
2286 valp = make_room(mem_start, mem_end, l, 4);
2287 call_prom("getprop", 4, 1, node, pname, valp, l);
2288 *mem_start = _ALIGN(*mem_start, 4);
2289
2290 if (!strcmp(pname, "phandle"))
2291 has_phandle = 1;
2292 }
2293
2294 /* Add a "linux,phandle" property if no "phandle" property already
2295 * existed (can happen with OPAL)
2296 */
2297 if (!has_phandle) {
2298 soff = dt_find_string("linux,phandle");
2299 if (soff == 0)
2300 prom_printf("WARNING: Can't find string index for"
2301 " <linux-phandle> node %s\n", path);
2302 else {
2303 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2304 dt_push_token(4, mem_start, mem_end);
2305 dt_push_token(soff, mem_start, mem_end);
2306 valp = make_room(mem_start, mem_end, 4, 4);
2307 *(__be32 *)valp = cpu_to_be32(node);
2308 }
2309 }
2310
2311 /* do all our children */
2312 child = call_prom("child", 1, 1, node);
2313 while (child != 0) {
2314 scan_dt_build_struct(child, mem_start, mem_end);
2315 child = call_prom("peer", 1, 1, child);
2316 }
2317
2318 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2319}
2320
2321static void __init flatten_device_tree(void)
2322{
2323 phandle root;
2324 unsigned long mem_start, mem_end, room;
2325 struct boot_param_header *hdr;
2326 char *namep;
2327 u64 *rsvmap;
2328
2329 /*
2330 * Check how much room we have between alloc top & bottom (+/- a
2331 * few pages), crop to 1MB, as this is our "chunk" size
2332 */
2333 room = alloc_top - alloc_bottom - 0x4000;
2334 if (room > DEVTREE_CHUNK_SIZE)
2335 room = DEVTREE_CHUNK_SIZE;
2336 prom_debug("starting device tree allocs at %x\n", alloc_bottom);
2337
2338 /* Now try to claim that */
2339 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2340 if (mem_start == 0)
2341 prom_panic("Can't allocate initial device-tree chunk\n");
2342 mem_end = mem_start + room;
2343
2344 /* Get root of tree */
2345 root = call_prom("peer", 1, 1, (phandle)0);
2346 if (root == (phandle)0)
2347 prom_panic ("couldn't get device tree root\n");
2348
2349 /* Build header and make room for mem rsv map */
2350 mem_start = _ALIGN(mem_start, 4);
2351 hdr = make_room(&mem_start, &mem_end,
2352 sizeof(struct boot_param_header), 4);
2353 dt_header_start = (unsigned long)hdr;
2354 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2355
2356 /* Start of strings */
2357 mem_start = PAGE_ALIGN(mem_start);
2358 dt_string_start = mem_start;
2359 mem_start += 4; /* hole */
2360
2361 /* Add "linux,phandle" in there, we'll need it */
2362 namep = make_room(&mem_start, &mem_end, 16, 1);
2363 strcpy(namep, "linux,phandle");
2364 mem_start = (unsigned long)namep + strlen(namep) + 1;
2365
2366 /* Build string array */
2367 prom_printf("Building dt strings...\n");
2368 scan_dt_build_strings(root, &mem_start, &mem_end);
2369 dt_string_end = mem_start;
2370
2371 /* Build structure */
2372 mem_start = PAGE_ALIGN(mem_start);
2373 dt_struct_start = mem_start;
2374 prom_printf("Building dt structure...\n");
2375 scan_dt_build_struct(root, &mem_start, &mem_end);
2376 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2377 dt_struct_end = PAGE_ALIGN(mem_start);
2378
2379 /* Finish header */
2380 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2381 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2382 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2383 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2384 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2385 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2386 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2387 hdr->version = cpu_to_be32(OF_DT_VERSION);
2388 /* Version 16 is not backward compatible */
2389 hdr->last_comp_version = cpu_to_be32(0x10);
2390
2391 /* Copy the reserve map in */
2392 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2393
2394#ifdef DEBUG_PROM
2395 {
2396 int i;
2397 prom_printf("reserved memory map:\n");
2398 for (i = 0; i < mem_reserve_cnt; i++)
2399 prom_printf(" %x - %x\n",
2400 be64_to_cpu(mem_reserve_map[i].base),
2401 be64_to_cpu(mem_reserve_map[i].size));
2402 }
2403#endif
2404 /* Bump mem_reserve_cnt to cause further reservations to fail
2405 * since it's too late.
2406 */
2407 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2408
2409 prom_printf("Device tree strings 0x%x -> 0x%x\n",
2410 dt_string_start, dt_string_end);
2411 prom_printf("Device tree struct 0x%x -> 0x%x\n",
2412 dt_struct_start, dt_struct_end);
2413}
2414
2415#ifdef CONFIG_PPC_MAPLE
2416/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2417 * The values are bad, and it doesn't even have the right number of cells. */
2418static void __init fixup_device_tree_maple(void)
2419{
2420 phandle isa;
2421 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2422 u32 isa_ranges[6];
2423 char *name;
2424
2425 name = "/ht@0/isa@4";
2426 isa = call_prom("finddevice", 1, 1, ADDR(name));
2427 if (!PHANDLE_VALID(isa)) {
2428 name = "/ht@0/isa@6";
2429 isa = call_prom("finddevice", 1, 1, ADDR(name));
2430 rloc = 0x01003000; /* IO space; PCI device = 6 */
2431 }
2432 if (!PHANDLE_VALID(isa))
2433 return;
2434
2435 if (prom_getproplen(isa, "ranges") != 12)
2436 return;
2437 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2438 == PROM_ERROR)
2439 return;
2440
2441 if (isa_ranges[0] != 0x1 ||
2442 isa_ranges[1] != 0xf4000000 ||
2443 isa_ranges[2] != 0x00010000)
2444 return;
2445
2446 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2447
2448 isa_ranges[0] = 0x1;
2449 isa_ranges[1] = 0x0;
2450 isa_ranges[2] = rloc;
2451 isa_ranges[3] = 0x0;
2452 isa_ranges[4] = 0x0;
2453 isa_ranges[5] = 0x00010000;
2454 prom_setprop(isa, name, "ranges",
2455 isa_ranges, sizeof(isa_ranges));
2456}
2457
2458#define CPC925_MC_START 0xf8000000
2459#define CPC925_MC_LENGTH 0x1000000
2460/* The values for memory-controller don't have right number of cells */
2461static void __init fixup_device_tree_maple_memory_controller(void)
2462{
2463 phandle mc;
2464 u32 mc_reg[4];
2465 char *name = "/hostbridge@f8000000";
2466 u32 ac, sc;
2467
2468 mc = call_prom("finddevice", 1, 1, ADDR(name));
2469 if (!PHANDLE_VALID(mc))
2470 return;
2471
2472 if (prom_getproplen(mc, "reg") != 8)
2473 return;
2474
2475 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2476 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2477 if ((ac != 2) || (sc != 2))
2478 return;
2479
2480 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2481 return;
2482
2483 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2484 return;
2485
2486 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2487
2488 mc_reg[0] = 0x0;
2489 mc_reg[1] = CPC925_MC_START;
2490 mc_reg[2] = 0x0;
2491 mc_reg[3] = CPC925_MC_LENGTH;
2492 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2493}
2494#else
2495#define fixup_device_tree_maple()
2496#define fixup_device_tree_maple_memory_controller()
2497#endif
2498
2499#ifdef CONFIG_PPC_CHRP
2500/*
2501 * Pegasos and BriQ lacks the "ranges" property in the isa node
2502 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2503 * Pegasos has the IDE configured in legacy mode, but advertised as native
2504 */
2505static void __init fixup_device_tree_chrp(void)
2506{
2507 phandle ph;
2508 u32 prop[6];
2509 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2510 char *name;
2511 int rc;
2512
2513 name = "/pci@80000000/isa@c";
2514 ph = call_prom("finddevice", 1, 1, ADDR(name));
2515 if (!PHANDLE_VALID(ph)) {
2516 name = "/pci@ff500000/isa@6";
2517 ph = call_prom("finddevice", 1, 1, ADDR(name));
2518 rloc = 0x01003000; /* IO space; PCI device = 6 */
2519 }
2520 if (PHANDLE_VALID(ph)) {
2521 rc = prom_getproplen(ph, "ranges");
2522 if (rc == 0 || rc == PROM_ERROR) {
2523 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2524
2525 prop[0] = 0x1;
2526 prop[1] = 0x0;
2527 prop[2] = rloc;
2528 prop[3] = 0x0;
2529 prop[4] = 0x0;
2530 prop[5] = 0x00010000;
2531 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2532 }
2533 }
2534
2535 name = "/pci@80000000/ide@C,1";
2536 ph = call_prom("finddevice", 1, 1, ADDR(name));
2537 if (PHANDLE_VALID(ph)) {
2538 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2539 prop[0] = 14;
2540 prop[1] = 0x0;
2541 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2542 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2543 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2544 if (rc == sizeof(u32)) {
2545 prop[0] &= ~0x5;
2546 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2547 }
2548 }
2549}
2550#else
2551#define fixup_device_tree_chrp()
2552#endif
2553
2554#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2555static void __init fixup_device_tree_pmac(void)
2556{
2557 phandle u3, i2c, mpic;
2558 u32 u3_rev;
2559 u32 interrupts[2];
2560 u32 parent;
2561
2562 /* Some G5s have a missing interrupt definition, fix it up here */
2563 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2564 if (!PHANDLE_VALID(u3))
2565 return;
2566 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2567 if (!PHANDLE_VALID(i2c))
2568 return;
2569 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2570 if (!PHANDLE_VALID(mpic))
2571 return;
2572
2573 /* check if proper rev of u3 */
2574 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2575 == PROM_ERROR)
2576 return;
2577 if (u3_rev < 0x35 || u3_rev > 0x39)
2578 return;
2579 /* does it need fixup ? */
2580 if (prom_getproplen(i2c, "interrupts") > 0)
2581 return;
2582
2583 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2584
2585 /* interrupt on this revision of u3 is number 0 and level */
2586 interrupts[0] = 0;
2587 interrupts[1] = 1;
2588 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2589 &interrupts, sizeof(interrupts));
2590 parent = (u32)mpic;
2591 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2592 &parent, sizeof(parent));
2593}
2594#else
2595#define fixup_device_tree_pmac()
2596#endif
2597
2598#ifdef CONFIG_PPC_EFIKA
2599/*
2600 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2601 * to talk to the phy. If the phy-handle property is missing, then this
2602 * function is called to add the appropriate nodes and link it to the
2603 * ethernet node.
2604 */
2605static void __init fixup_device_tree_efika_add_phy(void)
2606{
2607 u32 node;
2608 char prop[64];
2609 int rv;
2610
2611 /* Check if /builtin/ethernet exists - bail if it doesn't */
2612 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2613 if (!PHANDLE_VALID(node))
2614 return;
2615
2616 /* Check if the phy-handle property exists - bail if it does */
2617 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2618 if (!rv)
2619 return;
2620
2621 /*
2622 * At this point the ethernet device doesn't have a phy described.
2623 * Now we need to add the missing phy node and linkage
2624 */
2625
2626 /* Check for an MDIO bus node - if missing then create one */
2627 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2628 if (!PHANDLE_VALID(node)) {
2629 prom_printf("Adding Ethernet MDIO node\n");
2630 call_prom("interpret", 1, 1,
2631 " s\" /builtin\" find-device"
2632 " new-device"
2633 " 1 encode-int s\" #address-cells\" property"
2634 " 0 encode-int s\" #size-cells\" property"
2635 " s\" mdio\" device-name"
2636 " s\" fsl,mpc5200b-mdio\" encode-string"
2637 " s\" compatible\" property"
2638 " 0xf0003000 0x400 reg"
2639 " 0x2 encode-int"
2640 " 0x5 encode-int encode+"
2641 " 0x3 encode-int encode+"
2642 " s\" interrupts\" property"
2643 " finish-device");
2644 };
2645
2646 /* Check for a PHY device node - if missing then create one and
2647 * give it's phandle to the ethernet node */
2648 node = call_prom("finddevice", 1, 1,
2649 ADDR("/builtin/mdio/ethernet-phy"));
2650 if (!PHANDLE_VALID(node)) {
2651 prom_printf("Adding Ethernet PHY node\n");
2652 call_prom("interpret", 1, 1,
2653 " s\" /builtin/mdio\" find-device"
2654 " new-device"
2655 " s\" ethernet-phy\" device-name"
2656 " 0x10 encode-int s\" reg\" property"
2657 " my-self"
2658 " ihandle>phandle"
2659 " finish-device"
2660 " s\" /builtin/ethernet\" find-device"
2661 " encode-int"
2662 " s\" phy-handle\" property"
2663 " device-end");
2664 }
2665}
2666
2667static void __init fixup_device_tree_efika(void)
2668{
2669 int sound_irq[3] = { 2, 2, 0 };
2670 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2671 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2672 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2673 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2674 u32 node;
2675 char prop[64];
2676 int rv, len;
2677
2678 /* Check if we're really running on a EFIKA */
2679 node = call_prom("finddevice", 1, 1, ADDR("/"));
2680 if (!PHANDLE_VALID(node))
2681 return;
2682
2683 rv = prom_getprop(node, "model", prop, sizeof(prop));
2684 if (rv == PROM_ERROR)
2685 return;
2686 if (strcmp(prop, "EFIKA5K2"))
2687 return;
2688
2689 prom_printf("Applying EFIKA device tree fixups\n");
2690
2691 /* Claiming to be 'chrp' is death */
2692 node = call_prom("finddevice", 1, 1, ADDR("/"));
2693 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
2694 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
2695 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
2696
2697 /* CODEGEN,description is exposed in /proc/cpuinfo so
2698 fix that too */
2699 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
2700 if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
2701 prom_setprop(node, "/", "CODEGEN,description",
2702 "Efika 5200B PowerPC System",
2703 sizeof("Efika 5200B PowerPC System"));
2704
2705 /* Fixup bestcomm interrupts property */
2706 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2707 if (PHANDLE_VALID(node)) {
2708 len = prom_getproplen(node, "interrupts");
2709 if (len == 12) {
2710 prom_printf("Fixing bestcomm interrupts property\n");
2711 prom_setprop(node, "/builtin/bestcom", "interrupts",
2712 bcomm_irq, sizeof(bcomm_irq));
2713 }
2714 }
2715
2716 /* Fixup sound interrupts property */
2717 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2718 if (PHANDLE_VALID(node)) {
2719 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
2720 if (rv == PROM_ERROR) {
2721 prom_printf("Adding sound interrupts property\n");
2722 prom_setprop(node, "/builtin/sound", "interrupts",
2723 sound_irq, sizeof(sound_irq));
2724 }
2725 }
2726
2727 /* Make sure ethernet phy-handle property exists */
2728 fixup_device_tree_efika_add_phy();
2729}
2730#else
2731#define fixup_device_tree_efika()
2732#endif
2733
2734#ifdef CONFIG_PPC_PASEMI_NEMO
2735/*
2736 * CFE supplied on Nemo is broken in several ways, biggest
2737 * problem is that it reassigns ISA interrupts to unused mpic ints.
2738 * Add an interrupt-controller property for the io-bridge to use
2739 * and correct the ints so we can attach them to an irq_domain
2740 */
2741static void __init fixup_device_tree_pasemi(void)
2742{
2743 u32 interrupts[2], parent, rval, val = 0;
2744 char *name, *pci_name;
2745 phandle iob, node;
2746
2747 /* Find the root pci node */
2748 name = "/pxp@0,e0000000";
2749 iob = call_prom("finddevice", 1, 1, ADDR(name));
2750 if (!PHANDLE_VALID(iob))
2751 return;
2752
2753 /* check if interrupt-controller node set yet */
2754 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
2755 return;
2756
2757 prom_printf("adding interrupt-controller property for SB600...\n");
2758
2759 prom_setprop(iob, name, "interrupt-controller", &val, 0);
2760
2761 pci_name = "/pxp@0,e0000000/pci@11";
2762 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
2763 parent = ADDR(iob);
2764
2765 for( ; prom_next_node(&node); ) {
2766 /* scan each node for one with an interrupt */
2767 if (!PHANDLE_VALID(node))
2768 continue;
2769
2770 rval = prom_getproplen(node, "interrupts");
2771 if (rval == 0 || rval == PROM_ERROR)
2772 continue;
2773
2774 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
2775 if ((interrupts[0] < 212) || (interrupts[0] > 222))
2776 continue;
2777
2778 /* found a node, update both interrupts and interrupt-parent */
2779 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
2780 interrupts[0] -= 203;
2781 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
2782 interrupts[0] -= 213;
2783 if (interrupts[0] == 221)
2784 interrupts[0] = 14;
2785 if (interrupts[0] == 222)
2786 interrupts[0] = 8;
2787
2788 prom_setprop(node, pci_name, "interrupts", interrupts,
2789 sizeof(interrupts));
2790 prom_setprop(node, pci_name, "interrupt-parent", &parent,
2791 sizeof(parent));
2792 }
2793
2794 /*
2795 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
2796 * so that generic isa-bridge code can add the SB600 and its on-board
2797 * peripherals.
2798 */
2799 name = "/pxp@0,e0000000/io-bridge@0";
2800 iob = call_prom("finddevice", 1, 1, ADDR(name));
2801 if (!PHANDLE_VALID(iob))
2802 return;
2803
2804 /* device_type is already set, just change it. */
2805
2806 prom_printf("Changing device_type of SB600 node...\n");
2807
2808 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
2809}
2810#else /* !CONFIG_PPC_PASEMI_NEMO */
2811static inline void fixup_device_tree_pasemi(void) { }
2812#endif
2813
2814static void __init fixup_device_tree(void)
2815{
2816 fixup_device_tree_maple();
2817 fixup_device_tree_maple_memory_controller();
2818 fixup_device_tree_chrp();
2819 fixup_device_tree_pmac();
2820 fixup_device_tree_efika();
2821 fixup_device_tree_pasemi();
2822}
2823
2824static void __init prom_find_boot_cpu(void)
2825{
2826 __be32 rval;
2827 ihandle prom_cpu;
2828 phandle cpu_pkg;
2829
2830 rval = 0;
2831 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
2832 return;
2833 prom_cpu = be32_to_cpu(rval);
2834
2835 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
2836
2837 if (!PHANDLE_VALID(cpu_pkg))
2838 return;
2839
2840 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
2841 prom.cpu = be32_to_cpu(rval);
2842
2843 prom_debug("Booting CPU hw index = %lu\n", prom.cpu);
2844}
2845
2846static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
2847{
2848#ifdef CONFIG_BLK_DEV_INITRD
2849 if (r3 && r4 && r4 != 0xdeadbeef) {
2850 __be64 val;
2851
2852 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
2853 prom_initrd_end = prom_initrd_start + r4;
2854
2855 val = cpu_to_be64(prom_initrd_start);
2856 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
2857 &val, sizeof(val));
2858 val = cpu_to_be64(prom_initrd_end);
2859 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
2860 &val, sizeof(val));
2861
2862 reserve_mem(prom_initrd_start,
2863 prom_initrd_end - prom_initrd_start);
2864
2865 prom_debug("initrd_start=0x%x\n", prom_initrd_start);
2866 prom_debug("initrd_end=0x%x\n", prom_initrd_end);
2867 }
2868#endif /* CONFIG_BLK_DEV_INITRD */
2869}
2870
2871#ifdef CONFIG_PPC64
2872#ifdef CONFIG_RELOCATABLE
2873static void reloc_toc(void)
2874{
2875}
2876
2877static void unreloc_toc(void)
2878{
2879}
2880#else
2881static void __reloc_toc(unsigned long offset, unsigned long nr_entries)
2882{
2883 unsigned long i;
2884 unsigned long *toc_entry;
2885
2886 /* Get the start of the TOC by using r2 directly. */
2887 asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry));
2888
2889 for (i = 0; i < nr_entries; i++) {
2890 *toc_entry = *toc_entry + offset;
2891 toc_entry++;
2892 }
2893}
2894
2895static void reloc_toc(void)
2896{
2897 unsigned long offset = reloc_offset();
2898 unsigned long nr_entries =
2899 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
2900
2901 __reloc_toc(offset, nr_entries);
2902
2903 mb();
2904}
2905
2906static void unreloc_toc(void)
2907{
2908 unsigned long offset = reloc_offset();
2909 unsigned long nr_entries =
2910 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
2911
2912 mb();
2913
2914 __reloc_toc(-offset, nr_entries);
2915}
2916#endif
2917#endif
2918
2919/*
2920 * We enter here early on, when the Open Firmware prom is still
2921 * handling exceptions and the MMU hash table for us.
2922 */
2923
2924unsigned long __init prom_init(unsigned long r3, unsigned long r4,
2925 unsigned long pp,
2926 unsigned long r6, unsigned long r7,
2927 unsigned long kbase)
2928{
2929 unsigned long hdr;
2930
2931#ifdef CONFIG_PPC32
2932 unsigned long offset = reloc_offset();
2933 reloc_got2(offset);
2934#else
2935 reloc_toc();
2936#endif
2937
2938 /*
2939 * First zero the BSS
2940 */
2941 memset(&__bss_start, 0, __bss_stop - __bss_start);
2942
2943 /*
2944 * Init interface to Open Firmware, get some node references,
2945 * like /chosen
2946 */
2947 prom_init_client_services(pp);
2948
2949 /*
2950 * See if this OF is old enough that we need to do explicit maps
2951 * and other workarounds
2952 */
2953 prom_find_mmu();
2954
2955 /*
2956 * Init prom stdout device
2957 */
2958 prom_init_stdout();
2959
2960 prom_printf("Preparing to boot %s", linux_banner);
2961
2962 /*
2963 * Get default machine type. At this point, we do not differentiate
2964 * between pSeries SMP and pSeries LPAR
2965 */
2966 of_platform = prom_find_machine_type();
2967 prom_printf("Detected machine type: %x\n", of_platform);
2968
2969#ifndef CONFIG_NONSTATIC_KERNEL
2970 /* Bail if this is a kdump kernel. */
2971 if (PHYSICAL_START > 0)
2972 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
2973#endif
2974
2975 /*
2976 * Check for an initrd
2977 */
2978 prom_check_initrd(r3, r4);
2979
2980#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
2981 /*
2982 * On pSeries, inform the firmware about our capabilities
2983 */
2984 if (of_platform == PLATFORM_PSERIES ||
2985 of_platform == PLATFORM_PSERIES_LPAR)
2986 prom_send_capabilities();
2987#endif
2988
2989 /*
2990 * Copy the CPU hold code
2991 */
2992 if (of_platform != PLATFORM_POWERMAC)
2993 copy_and_flush(0, kbase, 0x100, 0);
2994
2995 /*
2996 * Do early parsing of command line
2997 */
2998 early_cmdline_parse();
2999
3000 /*
3001 * Initialize memory management within prom_init
3002 */
3003 prom_init_mem();
3004
3005 /*
3006 * Determine which cpu is actually running right _now_
3007 */
3008 prom_find_boot_cpu();
3009
3010 /*
3011 * Initialize display devices
3012 */
3013 prom_check_displays();
3014
3015#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3016 /*
3017 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3018 * that uses the allocator, we need to make sure we get the top of memory
3019 * available for us here...
3020 */
3021 if (of_platform == PLATFORM_PSERIES)
3022 prom_initialize_tce_table();
3023#endif
3024
3025 /*
3026 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3027 * have a usable RTAS implementation.
3028 */
3029 if (of_platform != PLATFORM_POWERMAC &&
3030 of_platform != PLATFORM_OPAL)
3031 prom_instantiate_rtas();
3032
3033#ifdef CONFIG_PPC_POWERNV
3034 if (of_platform == PLATFORM_OPAL)
3035 prom_instantiate_opal();
3036#endif /* CONFIG_PPC_POWERNV */
3037
3038#ifdef CONFIG_PPC64
3039 /* instantiate sml */
3040 prom_instantiate_sml();
3041#endif
3042
3043 /*
3044 * On non-powermacs, put all CPUs in spin-loops.
3045 *
3046 * PowerMacs use a different mechanism to spin CPUs
3047 *
3048 * (This must be done after instanciating RTAS)
3049 */
3050 if (of_platform != PLATFORM_POWERMAC &&
3051 of_platform != PLATFORM_OPAL)
3052 prom_hold_cpus();
3053
3054 /*
3055 * Fill in some infos for use by the kernel later on
3056 */
3057 if (prom_memory_limit) {
3058 __be64 val = cpu_to_be64(prom_memory_limit);
3059 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3060 &val, sizeof(val));
3061 }
3062#ifdef CONFIG_PPC64
3063 if (prom_iommu_off)
3064 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3065 NULL, 0);
3066
3067 if (prom_iommu_force_on)
3068 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3069 NULL, 0);
3070
3071 if (prom_tce_alloc_start) {
3072 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3073 &prom_tce_alloc_start,
3074 sizeof(prom_tce_alloc_start));
3075 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3076 &prom_tce_alloc_end,
3077 sizeof(prom_tce_alloc_end));
3078 }
3079#endif
3080
3081 /*
3082 * Fixup any known bugs in the device-tree
3083 */
3084 fixup_device_tree();
3085
3086 /*
3087 * Now finally create the flattened device-tree
3088 */
3089 prom_printf("copying OF device tree...\n");
3090 flatten_device_tree();
3091
3092 /*
3093 * in case stdin is USB and still active on IBM machines...
3094 * Unfortunately quiesce crashes on some powermacs if we have
3095 * closed stdin already (in particular the powerbook 101). It
3096 * appears that the OPAL version of OFW doesn't like it either.
3097 */
3098 if (of_platform != PLATFORM_POWERMAC &&
3099 of_platform != PLATFORM_OPAL)
3100 prom_close_stdin();
3101
3102 /*
3103 * Call OF "quiesce" method to shut down pending DMA's from
3104 * devices etc...
3105 */
3106 prom_printf("Quiescing Open Firmware ...\n");
3107 call_prom("quiesce", 0, 0);
3108
3109 /*
3110 * And finally, call the kernel passing it the flattened device
3111 * tree and NULL as r5, thus triggering the new entry point which
3112 * is common to us and kexec
3113 */
3114 hdr = dt_header_start;
3115
3116 /* Don't print anything after quiesce under OPAL, it crashes OFW */
3117 if (of_platform != PLATFORM_OPAL) {
3118 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3119 prom_debug("->dt_header_start=0x%x\n", hdr);
3120 }
3121
3122#ifdef CONFIG_PPC32
3123 reloc_got2(-offset);
3124#else
3125 unreloc_toc();
3126#endif
3127
3128#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
3129 /* OPAL early debug gets the OPAL base & entry in r8 and r9 */
3130 __start(hdr, kbase, 0, 0, 0,
3131 prom_opal_base, prom_opal_entry);
3132#else
3133 __start(hdr, kbase, 0, 0, 0, 0, 0);
3134#endif
3135
3136 return 0;
3137}